Posts by lotrsimp12345

actually i don't think i need that +1 because it starts counting at 0.
So if i entered in "ab" mycstring[0]=a mycstring[1]=b mycstring[2]='\0'.

most recent code

//main

#include <iostream>
#include <cstdlib>
using namespace std;
#include "strextra.h"

int main()
{
    Search a;
    cout<<"enter max number of characters in the sentence";
    int number;
    cin>>number;
    cout<<"enter a sentence";
    char let;
    char mycstring[number+1];
    for(int i=0; i<number; i++)
    {
        cin>>let;
        mycstring[i]=let;
    }
     mycstring[number+1]='\0';
     cout<<"my string is\n"<<mycstring<<"\n";
    cout<<"enter the character you are trying to find in the string above\n";
    char alpha;
    
    char lett[2];
    for(int a=0; a<1; a++)
    {
        cin>>alpha;
        lett[a]=alpha;
    }
    lett[1]='\0';
    cout<<lett[0]<<lett[1];
    //a.find(mycstring, lett);
    
}

//interface

#ifndef STREXTRA_H_INCLUDED
#define STREXTRA_H_INCLUDED
#include <iostream>

using namespace std;

class Search
{
    public:
    int find(char mystring,char letter);
    int find(char mystring,string word);
    
};

//implementation

#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;
#include "strextra.h"

int search::find(char mystring,char letter)
{
    return strchr(mystring,letter);
}

#endif // STREXTRA_H_INCLUDED

that's what i have the +1 for.

nvm. It gives me some conversion error.

it compiled.

a c-string start's storing at 0 and then when i have lett[1] it stores the '\0' so it only stores one character correct?

yeap i am compiling all of my files.

i haven't learnt about pointers yet. That's the next section. He says to use c-string and overloading

i am guessing the problem is that the parameters and arguments are matching up.

thanks for the help now it says undefined reference to search::find(char*,char*). does that mean my return statement doesn't match up?

i am supposed to make 2 functions called find and they are supposed to find a character or string if they are similar

when i do this progam gives me weird error:
"use of search ambigious"
"first declared as class search here.
//main

#include <iostream>
#include <cstdlib>
using namespace std;
#include "strextra.h"

int main()
{
    search a;
    cout<<"enter max number of characters in the sentence";
    int number;
    cin>>number;
    cout<<"enter a sentence";
    char let;
    char mycstring[number];
    for(int i=0; i<number; i++)
    {
        cin>>let;
        mycstring[i]=let;
    }
     mycstring[number]='\0';
     cout<<"my string is\n"<<mycstring<<"\n";
    cout<<"enter the character you are trying to find in the string above\n";
    char alpha;
    
    char lett[1];
    for(int a=0; a<1; a++)
    {
        cin>>alpha;
        lett[a]=alpha;
    }
    lett[1]='\0';
    a.find(mycstring, lett);
    
}

//interface

#ifndef STREXTRA_H_INCLUDED
#define STREXTRA_H_INCLUDED
#include <iostream>

using namespace std;

class search
{
    public:
    int find(char mystring[],char letter[]);
    int find(char mystring,string word);
    
};

#endif // STREXTRA_H_INCLUDED

//implementation

#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;
#include "strextra.h"

int search::find(char mystring[],char letter[])
{
    return strcspm(mystring[],letter[]);
}

thanks i completely forgot about that.

the error is on line 32 of my main program

//interface file

#ifndef STREXTRA_H_INCLUDED
#define STREXTRA_H_INCLUDED
#include <iostream>

using namespace std;

class search
{
    public:
    int find(unsigned char mystring,char letter);
    int find(char mystring[],string word);
    
};

#endif // STREXTRA_H_INCLUDED

//implementation

#include <iostream>
#include <cstdlib>

using namespace std;
#include "strextra.h"

int search::find(unsigned char mystring,char letter)
{
    return=strcspm(mystring,letter);
}

//main program

#include <iostream>
#include <cstdlib>
using namespace std;
#include "strextra.h"


int main()
{
    cout<<"enter max number of characters in the sentence";
    int number;
    cin>>number;
    cout<<"enter a sentence";
    char let;
    char mycstring[number];
    for(int i=0; i<number; i++)
    {
        cin>>let;
        mycstring[i]=let;
    }
     mycstring[number]='\0';
     cout<<"my string is\n"<<mycstring<<"\n";
    cout<<"enter the character you are trying to find in the string above\n";
    char alpha;
    
    char lett[1];
    for(int a=0; a<1; a++)
    {
        cin>>alpha;
        lett[a]=alpha;
    }
    lett[1]='\0';
    find(unsigned mycstring, lett);
    
}

thanks for help.

Char to string:
1
2
3
4
5
6
7

#include <sstream>
#include <string>
stringstream ss;
string s;
char c = 'a';
ss << c;
ss >> s;

String to int:
1
2
3
4
5
6
7

#include <sstream>
#include <string>
stringstream ss;
string s;
int n = 1;
ss << n;
ss >> s;

i think this would work.

i think that using stringstream might work.

they enter a problem set name and number. I am supposed to get in my problem name which i can do fine. for the numbers though i need to have it print out all the numbers they are supposed to do.

Example
input:
L1,2,3-5
output:
do problems 1,2,3,4,5 of L.

i am supposed to this without pointers. The next topic is pointers.

b=atoi(num,num.c_str());

it gives me error that request for member'c_str' in'num', which is of non-class type 'char'

what does that mean, i am passsing in a character

still confused why it won't convert.

k thanks.

this is code that won't convert.

int b=atoi(cin.get(num));

its in the num=="-".

#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{


    cout <<"enter the problemset and number""\n";
    //problems represents name and numbers
    string problems;
    char quote;
    char num;
    string number;
    
    //gather name
    if(cin.peek()=='"' || cin.peek() == '\'')
    {
        cin >>quote;
        getline(cin,problems,quote);
    }
    else
    {
        while (!isdigit(cin.peek()) && !isspace(cin.peek()))
        {
            (char)cin.peek();
            problems += cin.get();
        }
    }


    //gather problem numbers
    //cin >> num;
    int lastdigit=0;
    while(num != '\n'){
        
        cin.get(num);
        // can't use cin >> ws since it would eat the newline
       /* while (cin.peek() != '\n' && isspace(cin.peek()))
        {
            cin.ignore();
        }*/
        if(num==',')
        {
            if(isdigit(cin.peek()))
            {
                cin.get(num);
                cout<<"from comma"<<number<<"\n";
            }
                        
        }
        else if (num=='-')
        {
            if(isdigit(cin.peek()))
            {
            // remember num
             
            int b=atoi(cin.get(num));
            for(int a=lastdigit+1; a<=b; a++)
            {
                num++;  
            }
        }
        else if(cin.peek()=='\n')// must be a newline!
        {
//          
            break;
        }
        else if(isdigit(cin.peek()))
        {

        }
        if(isdigit(num))
        {
        lastdigit=num;
        }
        number=number+num;
    }
    
    cout<<"the final number is"<<number<<"\n"; 
        
    // print them all out

    return 0;
}

nvm. going to ask teacher.

so it works when there are quotes. but not when there aren't

i mean quotes and single quotes.

#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{


    cout <<"enter the problemset and number""\n";
    //problems represents name and numbers
    string problems , probtitle;
    string xx;
    bool x=true;
    char quote;
    string str1, str2;
    string begin;
    //gather name
    if(cin.peek()=='"' || cin.peek() == '\'')
    {
        cin >>quote;
        getline(cin,problems,quote);
    }
    else
    {
            getline(cin,problems);
    }

    //gather problem numbers

    while(x==true)
    {
        if(cin.peek()=='0'||cin.peek()=='1'||cin.peek()=='2'||cin.peek()=='3'||cin.peek()=='4'||cin.peek()=='5'||cin.peek()=='6'||cin.peek()=='7'||cin.peek()=='8'||cin.peek()=='9'||cin.peek()==','||cin.peek()=='-')
        {
            getline(cin,problems);
        }
        else
        {
            getline(cin,xx);
            if(xx.compare("\n"))
            {
            x=false;
            }
        }
    }
    cout<<problems;


int length=problems.find(',');
do{
    if(problems.find(',') != string::npos)
    {
        size_t a,b;
        a=problems.find(',');
        b=problems.find('-');


         if(problems.find('-') != string::npos&&b<a)
         {
                    str1 = problems.substr(0,problems.find('-'));
                    cout<<"from do ifif1\n"<<str1;
                    problems=problems.erase(0,problems.find('-'));
                    cout<<"from erase after first erase"<<problems;
                    str2=problems.substr(problems.find('-')+1,problems.find(','));
                    cout<<"from doifif2\n"<<str2;
                    problems=problems.erase(0,problems.find(',')+1);
                    cout<<"the problems left after erase are"<<problems;

        }
        else
        {
                    cout << "from do if else\n" ;
                    str1 = problems.substr(0,problems.find(','));
                    cout<<"from elseelseelseelse\n"<<str1;
                    problems=problems.erase(0,problems.find(',')+1);
        }

    }
    else
    {
        cout <<"No Comma\n";


        if(problems.find('-') != string::npos)
        {
                    str1 = problems.substr(0,problems.find('-'));
                    cout<<str1;
                    str2=problems.substr(problems.find('-')+1);
                    cout<<str2;
                    problems=problems.erase(0,problems.find('-')+1);
        }
        else
        {cout << "\n IF ELSE" ;
                    str1 = problems.substr(0,problems.find(','));
                    cout<<str1;
                    if(problems.find(',') != string::npos)
                    {
                    problems=problems.erase(0,problems.find(',')+1);
                    }
                    else{
                        problems="";
                    }
        }

    }
}while(problems.length()>0 );

most recent code:

#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{


    cout <<"enter the problemset and number""\n";
    //problems represents name and numbers
    string problems , probtitle;
    string xx;
    bool x=true;
    char quote;
    string str1, str2;
    string begin;
    //gather name
    if(cin.peek()=='"' || cin.peek() == '\'')
    {
        cin >>quote;
        getline(cin,problems,quote);
    }
    else
    {
            getline(cin,problems);
    }

    //gather problem numbers

    while(x==true)
    {
        if(cin.peek()=='0'||cin.peek()=='1'||cin.peek()=='2'||cin.peek()=='3'||cin.peek()=='4'||cin.peek()=='5'||cin.peek()=='6'||cin.peek()=='7'||cin.peek()=='8'||cin.peek()=='9'||cin.peek()==','||cin.peek()=='-')
        {
            getline(cin,problems);
        }
        else
        {
            getline(cin,xx);
            if(xx.compare("\n"))
            {
            x=false;
            }
        }
    }
    cout<<problems;


int length=problems.find(',');
do{
    if(problems.find(',') != string::npos)
    {
        size_t a,b;
        a=problems.find(',');
        b=problems.find('-');


         if(problems.find('-') != string::npos&&b<a)
         {
                    str1 = problems.substr(0,problems.find('-'));
                    cout<<"from do ifif1\n"<<str1;
                    problems=problems.erase(0,problems.find('-'));
                    cout<<"from erase after first erase"<<problems;
                    str2=problems.substr(problems.find('-')+1,problems.find(','));
                    cout<<"from doifif2\n"<<str2;
                    problems=problems.erase(0,problems.find(',')+1);
                    cout<<"the problems left after erase are"<<problems;

        }
        else
        {
                    cout << "from do if else\n" ;
                    str1 = problems.substr(0,problems.find(','));
                    cout<<"from elseelseelseelse\n"<<str1;
                    problems=problems.erase(0,problems.find(',')+1);
        }

    }
    else
    {
        cout <<"No Comma\n";


        if(problems.find('-') != string::npos)
        {
                    str1 = problems.substr(0,problems.find('-'));
                    cout<<str1;
                    str2=problems.substr(problems.find('-')+1);
                    cout<<str2;
                    problems=problems.erase(0,problems.find('-')+1);
        }
        else
        {cout << "\n IF ELSE" ;
                    str1 = problems.substr(0,problems.find(','));
                    cout<<str1;
                    if(problems.find(',') != string::npos)
                    {
                    problems=problems.erase(0,problems.find(',')+1);
                    }
                    else{
                        problems="";
                    }
        }

    }
}while(problems.length()>0 );

so input could be
"bob"1-5,6-10,11-15,57
or
'bob' 1-6,1-7,9-10
or
bob 1-7,12-18
spaces don't matter after problemset name
output could be
do problems 1,2,3,4,5,6,7,12,13,14,15,16,17,18 of bob. from last example

what class is utility function from? can only use string class and c-string class.

so my problem is they enter a line of code which contains the problemname which may contain quotes or not.Then have to find the numbers. Say do problems what ever numbers each seperated by a comma and finally state what problem set from. Can't have duplicate numbers and must be ordered.

if it contains quote it cuts it out, then i am stuck on part when i just enter in a problemset without a quote or single quote. Then it doesn't gather numbers correctly but stores the entire string

int main()
{


    cout <<"enter the problemset and number""\n";
    //problems represents name and numbers
    string problems , probtitle;
    string xx;
    bool x=true;
    char quote;
    string str1, str2;
    string begin;
    //gather name
    if(cin.peek()=='"' || cin.peek() == '\'')
    {
        cin >>quote;
        getline(cin,problems,quote);
    }
    else
    {
            getline(cin,problems);
    }
cout<<problems;

    //gather problem numbers

    while(x==true)
    {
        if(cin.peek()=='0'||cin.peek()=='1'||cin.peek()=='2'||cin.peek()=='3'||cin.peek()=='4'||cin.peek()=='5'
||cin.peek()=='6'||cin.peek()=='7'||cin.peek()=='8'||cin.peek()=='9'||cin.peek()==','||cin.peek()=='-')
        {
            getline(cin,problems);
        }
        else
        {
            getline(cin,xx);
            if(xx.compare("\n"))
            {
            x=false;
            }
        }
    }
    cout<<problems;

thanks that was really helpful.

my problem is when it prompts again. it never goes and asks the user to hit enter. because once they hit enter it stops.

so after you hit yes, it should print out original time and then wait for user to hit enter,then enter loop

#include <iostream>
using namespace std;
#include "Interface.h"
#include <conio.h>




int main()
{
    apple t;

    bool quit = false;


    while(! quit)
    {
        cout<<"the original value at beginning of clock is\n"<<clock()<<"\n";
        t.start();
        cout<<"hit enter when you want to stop timer\n";
        if(cin.get()=='\n')
        {
            t.end();
            int time =t.elapsed();
            cout<<"the time difference is\n"<<time<<"\n";
            cout<<"enter yes if you want to find out time differences for more times\n";
            if(cin.get()=='y')
            {
                cout<<"from yes";
            }
            else
            {
                cout<<"from no";
                quit=false;
                break;
            }
        }
    }
    return 0;
}

never mind got it is called implementation file .ccp instead of .cpp

Implementation file

using namespace std;
#include "Interface.h"
#include <time.h>



void timer::start()
{
    if(! running)
    {
        begin=(unsigned int) clock();
        running=true;
    }
}

void timer::end()
{
    if(running)
    {
        finish=(unsigned int) clock();
        running=false;
    }
}

int timer::elapsed()
{
    if(running)
    {
        return((unsigned int) clock()-begin);
    }
    else
    {
        return finish-begin;
    }
}

int timer::output(unsigned int seconds)
{
    return seconds >= elapsed();
}




interface file
#ifndef INTERFACE_H_INCLUDED
#define INTERFACE_H_INCLUDED
//#include <time.h>
class timer
{
    public:
    void start();
    void end();
    int elapsed();
    int subtract();
    int add();
    int output(unsigned int seconds);
    private:
    bool running;
    int begin;
    int finish;
};
#endif // INTERFACE_H_INCLUDED


main file

#include <iostream>
using namespace std;
#include "Interface.h"
#include <conio.h>




    int main()
    {
        timer t;
        bool quit = false;
        char choice;
        choice=getch();
        while(! quit)
        {
            t.start();
            t.end();
            cout<<"the time difference is"<<t.elapsed();
        }
        return 0;
    }

Here are my 3 files

interface file

#ifndef INTERFACE_H_INCLUDED
#define INTERFACE_H_INCLUDED
#include <time.h>
class timer
{
    public:
    void start();
    void end();
    int elapsed();
    int subtract();
    int add();
    int output(unsigned int seconds);
    private:
    bool running;
    int begin;
    int finish;
};
#endif // INTERFACE_H_INCLUDED



implementation file
using namespace std;
#include "Interface.h"
#include <time.h>


timer::timer()
{
    running=false;
    begin=0;
}
void timer::start()
{
    if(! running)
    {
        begin=(unsigned int) clock();
        running=true;
    }
}

void timer::end()
{
    if(running)
    {
        finish=(unsigned int) clock();
        running=false;
    }
}

int timer::elapsed()
{
    if(running)
    {
        return((unsigned int) clock()-begin);
    }
    else
    {
        return finish-begin;
    }
}

int timer::output(unsigned int seconds)
{
    return seconds >= elapsed();
}


Test file
#include <iostream>
using namespace std;
#include "Interface.h"
#include <conio.h>
class Test
{
int main()
{
    bool quit = false;
    char choice;

    choice=getch();
    timer t;
    while(! quit)
    {
        t.start();
        t.end();
        cout<<"the time is"<<t.output();
    }
}
}



ERROR::::::No matching call for function 'timer::output()

yea that's in my test class

anyone know how to change it a project into a console project in codeblocks?

#include <iostream>
using namespace std;
#include "Interface.h"


void timer::start()
{
    if(! running)
    {
        begin=(unsigned int) clock();
        running=true;
    }
}

void timer::end()
{
    if(running)
    {
        finish=(unsigned int) clock();
        running=false;
    }
}

int timer::elapsed()
{
    if(running)
    {
        return((unsigned int) clock()-begin);
    }
    else
    {
        return finish-begin;
    }
}

int timer::output(unsigned int seconds)
{
    return seconds >= elapsed();
}

It says undefined reference to '_WinMain@16'

i got it to work. So i don't need help anymore.

problemlength wasn't declared in this scope

it doesn't like problems.length

#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{


    cout <<"enter the problemset and number""\n";
    //problems represents name and numbers
    string problems;
    string problem_name_and_numbers=problems;
    string numbers;
    char quote;
    int total_length=problems.length();
    //gather name
    if(cin.peek()=='"' || cin.peek() == '\'')
    {
        cin >>quote;
        getline(cin,problems,quote);
        int problemslength=(problems.length()+1);
        int difference=total_length-problemlength;
        numbers=problem_name_and_numbers.substr(problemlength,difference);
    }
    else
    {
        getline(cin,problems);
        int problemslength=(problems.length()+1);
        int difference=total_length-problemlength;
        numbers=problem_name_and_numbers.substr(problemlength,difference);
    }

    //gather problem numbers

    return 0;
}

can't use that class he says only C-string or string class may be used.

thanks for the help. will ask teacher tom.

this doesn't seem to work.
char a=static_cast<char>(beginValue);

apparently that won't work for the same reason.