19,876 Topics
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| | I need to parse a file line by line and check if the line is in a valid BNF format and print it out if it is. Below is my BNF grammar: <line> ::= <program names><spaces><uids><spaces><dest IPs><spaces><ports> <spaces> ::= <blank character> | <blank character><spaces> <blank character> ::= ' ' | …  |
| | Good day. I need help on a program that I'm working on. It's supposed to take the strings in input.txt and put the odd numbered lines to odd.txt and the even ones to even.txt. here's the code I have made so far... [CODE] #include<stdio.h> #include<stdlib.h> #define p printf #define s … |
| | Hello, I'm trying to split a string into 4 separate strings using a delimiter "\n" The initial string is: "/usr/bin/ssh \n * \n 147.188.195.15, 147.188.193.15, 147.188.193.16 \n 22" I would like it to be split up into four different char's so that char *programnames = "/usr/bin/ssh \n" char *uids = … |
 | Consider the following program and input file: [code] #include <algorithm> #include <cstdlib> #include <ctime> #include <functional> #include <fstream> #include <iostream> #include <iterator> #include <string> #include <vector> #include "natural_compare.h" struct natural_less: std::binary_function<std::string, std::string, bool> { bool operator()(const std::string& a, const std::string& b) { return natural_compare(a, b) < 0; } }; std::vector<std::string> …  |
| | Here is the output for the following code. Can someone help me put the five prods on rows and sales reps on columns w a few changes??? Enter seller's code (-1 to exit): 2 Enter product code: 2 Enter sold for seller 2, product 2: 2 Enter sellers code (-1 … |
| | [code=c] int main(int argc, char* argv[]) { int a=3,b=2,c; a=a==b==0; printf("%d\n",a); return 1; } [/code] I cannot understand why this code gives 1 as the answer. According to me , this should be the order of evaluation b==0, which gives false & the expression becomes a=a==0 this should again give … |
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| | I am 12, mad about computers and skateboarding, im an emo, i know it doesnt sound right that i like programming. anyway, i have started learning c++, only just! I would like to know first of all if it is possible that you can build your own operating system with … |
| | Hi, I'm working on a C++ mini-project ( I'm having an unoriented graph for wich I have an admissible flow and I have to determine the minimal flow for it). Everithing works fine, it compiles and runs well (the code is below) but I'm using files to read input and … |
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| | A program that handles either piped input (command/prog | your_prog) or file redirected (your_prog < file_name) input. Determine whether such input exists before issuing a stdin read so that the program does not go into a "waiting for input" state. Written in/for the XP environment. |
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| | two static arrays size 10 need to be copied to an empty target array size 20. like this: you copy from the first array the nums till arr1[i] = 0 then you switch to the second array and copy to the nums till arr2[i] = 0. then you switch back, … |
| | Iam a freshmen and we're given a task to program a calendar using turbo C and does'nt exceed line 54 and some texts are with specific colors.(red) for the days under sunday,(light gray)for the month.... I will really appreciate your help thanks....... Here's the format: ex: enter month:1 january 2004 …  |
| | I need help with the errors in my code. Here is my pseudocode along with my program code following: [B][U]This is my pseudocode:[/U][/B] Start Declare Variable int length int width int area Print (“Enter length of room in ft.: “), Input length Print (“Enter width of room in ft.: ”), … |
| | I have gotten my program to the point that it allows me to enter the data I want to enter. However, I do not know how to get the program to loop back correctly and ask for salesperson number and stop the loop when I enter -1. Help![CODE] #include <stdio.h> …  |
| | deleting string... example: deleting... enter string: the quick brown fox and the lazy dog. enter string to delete: the([I]the first one[/I]) new string: quick brown fox and the lazy dog.  |
| | Hello all, I have a program that creates an array of structs. It is consistently exhibiting 1 of 2 problems and I can't figure out exactly what is wrong, but the problems seem related to each other. Problem 1: For some reason the category member of the mediaItem struct fails …  |
| | Hi, Im trying 2 write the contents of a input file to an output file in reverse order using file I/O in C. Is there a more efficient way 2 do it? [CODE] int main() { FILE *fp1,*fp2; char ch,arr[100]; int i=0; if( (fp1 = fopen("input.txt","r")) == NULL ) { … |
| | Hello, I am attempting to rewrite a program in c. Here is what I have so far. Thanks in advance for assistance. [CODE]#include <stdio.h> void sales[ salesPerson ][ product ] += value; int main() { const int PEOPLE = 5, PRODUCTS = 6; double sales[ PEOPLE ][ PRODUCTS ] = … |
| | I am unable to print out the error message when there is no input. I've tried different methods for it, but I can't get it to work. What am I missing? print should be: p2 invalid input but I get: p2 segmentation fault when I do this with an int … |
| | Ok well I'm making a console msn client. [CODE]#pragma comment(lib, "wsock32.lib ") #include <windows.h> #include <iostream> #include <stdio.h> #include <string.h> int main(){ char buf[12]; WSAData wsdata; WORD wsver=MAKEWORD(2, 0); int nret=WSAStartup(wsver, &wsdata); if(nret != 0){ std::cout<<"Startup failed, error code: "<<WSAGetLastError(); WSACleanup(); return -1; } std::cout<<"Init success\n"; SOCKET kSock=socket(AF_INET, SOCK_STREAM, 0); … |
| | I have been trying to get the day of the year into an int(0-365). I have tried the time.h library and did int tm_yday but it returned an incorrect number. I am using Linux. G++(gcc) compiler. Thanks for the help. |
| | Hey all, I'm writing a program in C++ for a contest. The code executes no problem on my computer at school that I'm writing it on. I get all the correct answers. When I upload it however, it keeps on saying "runtime error (SIGSEGV)" Please Help!! here's the link to … |
| | Hi, i understand the ieee 754 representation. but can some one explain why we need to add specifically 127 to the power of 2. for ex: 5.75 ; 101.110 can be written as 1.01110 * 2 ^ 2 127 +2 = 129 . i.e 10000001 now IEEE 754 of 5.75 … |
| | below is one simplest code to illustare the pyramid of number. [CODE] void piramid(int const c) { int r, x; for (r = c; r > 0; r--) { for (x = 1; x < = (2 * c - r); x++) { if (x < r) printf(" "); else … |
| | Hello, I have a query on dynamic allocation of memory in C. I am storing 4 seconds of audio data in a buffer allocated with sufficient memory using malloc function. If I wanted to record another 4 seconds of audio in the same buffer, I would have to increase the … |
 | I'M reading the book that's in the title. Let me show you what's going on. I'M given the following code, an example of Inheritance. [CODE]using System; namespace CritClone { class CritViewer { static void Main(string[] args) { CritViewer cv = new CritViewer(); }// end main public CritViewer() { Clone myClone …  |
| | Hi. I have never used a command-line compiler before and I'm very confused now. I need to use this compiler for my home assignments in one of my subjects in University. I installed the compiler but I don't know how to use it. Help file says: [I]To see a list … |
| | HI I want to write a class that it gets two decimal numbers and add them without using decimal expression like double and float . for example 12/05 + 1/98 =14.3 How can I do so ? thanks  |
| | Question 1: [CODE]main() {int i=-3,j=2,k=0,m; m=++i||++j&&++k; printf("\n%d%d%d%d",i,j,k,m); } [/CODE] ans is -2201 how? Question 2: [CODE]main() { int a,b; a=sumdig(123); b=sumdig(123); printf("\n%d%d",a,b); } sumdig(int s) { static int s=0; int d; if (n!=0) { d=n%10; n=(n-d)/10; s=s+d; sumdig(n); } else return(s); } [/CODE] please explain the ans  |
| | Can someone please explain the meaning of these return 1 vs return 0 vs break. I know 1 generally means true and 0 generally means false but how would they effect a return statement? Also when would you wanna use a return statement instead of a break statement and vice … |
| | I'm trying to create a program in C# that allows for arithmetic of Complex Numbers. Just adding, subtracting, multiplying and dividing. Anyone got any suggestions?  |
| | Hello all, When I try to compile a small program I am getting an error that I do not quite understand. I get this error: media_tracker1.c: In function 'add': media_tracker1.c:152: error: expected expression before ';' token when I try to compile this code: [CODE= "c"] #include <stdio.h> #include <stdlib.h> #define … |
| | I have to write a program that accepts a pointer to a c-string as its argument. The function should return the charater that appears most frequently in the string along with the number of times it appears. for example, if i input "hello dolly" the output would be: "l sppears … |
| | hi, I have a problem with BST. For example after the insertions of below numbers, 23 1 45 2 3 5 52 234 31 The output should be like this way: [B]23[/B] [B][/B][B]1,45[/B] [B][/B][B]-,2 | 31,52[/B] [B][/B][B]-,- | -,3 | -,- | -,234[/B] [B][/B][B]-,- | -,- | -,- | -,5 … |
| | Hi Friends, I have no clue how to solve following C++ question.I am a learner.Thank you in advance. Question -- Simulation and use of random/io libraries A recent New York Times article featured a report on the usability, stability, and effectiveness (or lack thereof) of current electronic voting systems. By … |
| | Hi frens, I couldn't compile this solution code given by my university on visual studio.Visual studio works fine with other C++ files. Here are the question and solution code pasted below.I wonder if anybody could try to compile the solution code on thier machine and see if they can run … |
| | Hello guys. I am working on the code below. I am trying to create my own shell. The code compiles without errors, but when I execute it though it doesn't output anything. I have tried it with /bin/ls as input and it doesn't work. Any suggestions? [code=c]#include <stdio.h> #include <stdlib.h> … |
| | Hi frenz, the above code runs perfect. But while printing the arrays x y z the value of y[0]changes...could u plz help me in sorting this problem.. thank u.. this is the output.. [B]x y z[/B] 1 -1 0 2 4 -2 3 3 0 4 2 2 5 1 … |
| | Hi guys, I have a txt file in which each line contains information in following format: VELOCITY<100.0> LAT_1<N 00 00.0000> LON_1<E 000 00.0000> SIMULATE<false> I would like to write a C or C++ programm to select only the values of the words I need. I need those values to do … |
| | I have been trying to check Internet connection but all ways I have tried have failed. Some example code would be great, or the package to use. Thanks very much. |
| | Hi, I recently bought a book-The Complete Reference C++ by Herbert Schildt. The first part explains about the similarities about C++ and C. The syntax used is different from the one my lecturer is teaching. eg: cout<< is replaced by printf cin>> is replaced by scanf I would like to … |
| | Please, I have tried everything that I can learn from a book...any help with this problem is greatly appreciated. I've spent days writing and modifying and I am just lost now. Is there anybody that can help me solve this question using C language? You are developing a database of … |
| | Hi, I am required to first read a number, n and then n lines of string. The strings can contain leading spaces which has to be preserved: 2 " hello world" ... using [CODE]scanf("%d", &n); for (int i = 0;i < n;i++) { scanf(" [^\n]", message); .... printf("Case #%d: %d\n",case_count, … |
 | How to add 1/1+ 1/2+1/3...+1/9+1/10 . I tried but I am getting answer in negative number. |
| | i need a c programme that reads a txt that you chosse then count the number of each word in the programme i have e.g. "hello this word is very funny this is not" hello 1 this 2 word 1 is 2 very 1 funny 1 not 1 i would … |
| | I have a question regarding scope for a character array defined as follows: saveDataObj->save("This is the first entry", 1, 2); Here is how the SaveData class has been defined: [code=c++] class SaveData { struct entry{ const char* data; int data1; } entry* mpData; static int iter; } //Constructor SaveData::SaveData() { … |
| | Why the output is 100? [CODE]#define f(g,g2) g##g2 int main() { int var12=100; printf("%d",f(var,12)); return(0); }[/CODE] |
| | I'm curious why all the events code and autogenerated code when controls are added to the form are written to the form1.h instead of the form1.cpp. Is this a configuration item? This defeats the purpose of information hiding by separating the declaration from the implementation. |
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