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May 7th, 2008

Brainteaser codes

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It's not homework it is just a play.If you have any simmilar tragic like this one with int and character or float then please discuss it here or explain how things happen.Let this thread be informative.

I'm playing with int,floats and type casts but i have found that in following program when i enter the value of first integer as float,it skips out the cout statement that asks for float value,instead it takes the float value frm the decimal number we entered frm the first first input we get from cin.What is going on? i dnt get it if i entered float value then it skips next statement?How and why?How can i get my chance of inputing another float number in that case? Anyone like to explain what happened here?

C++ Syntax (Toggle Plain Text)
//IDE: Codeblocks 8.02
#include<iostream>
using namespace std;
int main()
{
    int a;
    float b;
    cout<<"Enter the integer number"<<endl;
    cin>>a;
    cout<<"\n Enter float number"<<endl;
    cin>>b;
    cout<<endl;
    cout<<a<<endl;
    cout<<b<<endl;
    system("pause");
    exit(0);
}
//IDE: Codeblocks 8.02
#include<iostream>
using namespace std;
int main()
{
    int a;
    float b;
    cout<<"Enter the integer number"<<endl;
    cin>>a;
    cout<<"\n Enter float number"<<endl;
    cin>>b;
    cout<<endl;
    cout<<a<<endl;
    cout<<b<<endl;
    system("pause");
    exit(0);
}

I have one more Big Question in this case is that "If i want to find out what value is input by user here,before printing it.How can i find out that it's integer or float?"

You can pass your teasing questions here or answer mine,i'm looking for simmilar situations with the code.

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arunpawar

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May 7th, 2008

Re: Brainteaser codes

Click to Expand / Collapse Quote originally posted by arunpawar ...

I have one more Big Question in this case is that "If i want to find out what value is input by user here,before printing it.How can i find out that it's integer or float?"

You could store the user input in a string (instead of int or float), then check it for '.' character. If it has '.' then it's a float. Then use the string with a stringstream to put the number into float or int varable as desired.

dougy83

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May 7th, 2008

Re: Brainteaser codes

Thnxfor big question.Do u have anything Teasing..Do post it in here...

arunpawar

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May 7th, 2008

Re: Brainteaser codes

Teasing questions right.
What is the output of this.

#include<stdio.h>

int main ()
{
printf ( "%f", 10 ) ;
return 0 ;
}

Last edited by Prabakar; May 7th, 2008 at 7:38 am.

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May 8th, 2008

Re: Brainteaser codes

That was teasing one...it prints 0.00000 on my console......
can u explain why? and next teasing code guys,,,keep then coming...

arunpawar

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May 8th, 2008

Re: Brainteaser codes

Give your mind a thought first.

Prabakar

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May 9th, 2008

Re: Brainteaser codes

i got it regarding the Format specifier..Hehe...Next question...Lets start with something teasy with strings...

arunpawar

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May 9th, 2008

Re: Brainteaser codes

CPP Syntax (Toggle Plain Text)
#include <iostream>
#define ENIUQ(TEMPLATE) std::cout << TEMPLATE << "(" << #TEMPLATE << ");}";
 
int main()
{ENIUQ("#include <iostream>\n#define ENIUQ(TEMPLATE) std::cout << TEMPLATE << \"(\" << #TEMPLATE << \");}\";\n\nint main()\n{ENIUQ");}
#include <iostream>
#define ENIUQ(TEMPLATE) std::cout << TEMPLATE << "(" << #TEMPLATE << ");}";

int main()
{ENIUQ("#include <iostream>\n#define ENIUQ(TEMPLATE) std::cout << TEMPLATE << \"(\" << #TEMPLATE << \");}\";\n\nint main()\n{ENIUQ");}

Here's one for you.

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