[c] Forum Topics

The simplest way is now friends with this command when running this sample compiled #include <stdio.h> #include "fcgi_stdio.h" int main(int argc, char *argv[]) { while(FCGI_Accept() >= 0) { printf("Content-Type: text/html; charset=UTF-8"); printf("<center><br><br>Hello World Wide Web</center>"); } return 0; } **operation type:** cgi-fcgi -start -connect localhost:9000 ./hello After you run this …

[B]This will works Recusivly and easily[/B]

#include<stdio.h> #include<conio.h> #include<string.h> struct student { int*ptr[23]; char*name[12];//store address of character string }s1; void main() { int roll=20; //char n='s'; s1.ptr=&roll;//ERROR s1.name="zahid ali";//ERROR printf("roll no of student :%d\n",*s1.ptr); printf("name of student:%s\n",s1.name); getch(); }//plase coorect this error

Write a program that displays the outline of a box five characters wide and five characters tall. Use the ‘*’ character for the box outline. here are my codes: #include <stdio.h> #include <stdlib.h> int main() { printf("%c\v", '*'); printf("%c\v", '*'); printf("%c\v", '*'); printf("%c\v", '*'); printf("%c\n", '*'); printf("%c%8c\n", '*','*'); printf("%c%8c\n", '*','*'); …

Hi, i have a problem here i am trying to write to a file through fwrite and read through fread functions. it asks me to enter 5 values with no problem but when i trying to read from a file it prints 6 values, the 5th values prints twice what's …

Write a program to calculate the estimated journey time of a train. The program should request and read the distance in miles and the average speed in miles per hour, and display the estimated journey time in hours and minutes to the nearest minute. Test your program with: a) Distance …

Hello all, I am new to Glut, and I have made a program in C to draw lines and triangle using bresenham algorithm. But, when i run the code, the display function is called 3 times automatically. I want it to run only once. If I give input for one …

As i work through my code, i notice a little error message as i try to compile/build my code. It says that the PDB File is missing. Can someone explain to me what is a PDB file and how do i make it "visible" in order to keep the error …

I have been reading the head first book about C and I am having a bit of problem with one of the given examples. The example is shown talking about a "code magnet" for a game of blackjack. I went to try out the code and tried to make my …

Today I am going to show you how to create a C project in Visual Studios. ***Step 1.*** Launch Visual Studios and select **Visual C++** in the start window. In the Visual C++ section, click on **Win32 Console Application**. Give your project a name and click submit. *Step 2.* A …

Look at this: http://www.codinghorror.com/blog/2007/01/how-to-become-a-better-programmer-by-not-programming.html Did someone who simply couldn't write efficient code (complexity-wise) before, felt intimidated by people who did, decide to work really hard, try to solve an insane number of problems, actually get better? I've been in touch with programming since some 4-5 years. Some of my friends …

I created a simple password program which takes a string when its invoked, and prints thank you if its correct. Now I want to write a brute forcer. The password is a 4 blocks 4 digit password ( example 1234 5678 9012 3456, so its called like this C:\>pass 1234 …

This is a shameful question for me to ask but how do i keep the debug window open... it keeps on closing automatically rather than me closing it manually. I am using visual studios and it used to work when I just simply click (ctrl + f5). I doesn't work …

How do i create a c project properly in visual studios. They (Youtube) say to click on the C++ button and change it from .cpp to .c. But when I debug my code to see my code compiled, I get an error saying that a PDB file is missing. What …

Make a program that would count and add numbers which either one of the remainders when divided by 2 given divisors is equal to remainder searched. The program should accept 5 numbers to be divided by the 3 entered divisor. Sample Output: Enter divisors : 2 4 Enter remainder to …

Hi, I have written a c code that finds euclidean distance between corresponding elements of two 2D arrays. i have taken two text files like this.. 9.0444 0.083404 -0.30599 -0.21367 -0.032527 -0.048789 -0.17683 -0.10523 0.050547 -0.028377 -0.06061 -0.0011242 -0.031838 9.164 0.18631 -0.3277 -0.1631 -0.014165 -0.041347 -0.063973 -0.059217 0.1422 -0.076865 -0.22507 …

while trying to compare times between two different ways of determing whether a number is odd/even without using modulo, i thought of using `long long int`s which my codeblocks compiler aint supports . and so i installed pelles c.( supports c99/c11 which inturn supports long long stuff.. ) and im …

i want to write a C logic which would do the scnning the entire host in the network. i hve got IP address ,subnet mask and networka address till now by my code. But i don't know how to start..i want the functioanlity similar to NMAP. yours sincerely aditya prakash

This function takes a string and an output buffer and a desired width. It then copies the string to the buffer, inserting a new line character when a certain line length is reached. If the end of the line is in the middle of a word, it will backtrack along …

Here is a linked list code in C , It does not give expected output . Input NUMBER OF ELEMENTS -3 but it takes only 2 element and prints them with an extra zero. here is the output **ENTER THE NUMBER OF ELEMENTS 3 1 2 The list contains 0 …

What is the best multiplication algorithm which has lower time complexity than Strassen's multiplication algorithm??

can you please explain me what exactly it is ? i have read from my book, wiki link and 1 more link. i got some basic things, can you tell me how exactly this helps process and OS ? how this thing help us to implement cache ? i think …

Hello guys, I need to make a C program that reads a text file for example the following sentence: 5 + 7, 10-15 ... (etc.), and show the result. I managed to make it solve part of the problem. The program is making the sum of the first line. But …

Hello everyone, new user here and not a frequent user of C so please don't be harsh at me :P What I'm trying to do is read some data from a txt file, like these: > XX10X11110100X0011111XX1011101X101111XX1X1X1111X11X110111110XX11,000 > 010101100XX1110000110X00110111100010XX001101101X1011X10XX0X0XX01,001 and copy them to 2 string arrays. The first array's first …

We are able to capture the whole packet hex values. The issue now from the hex values we want to dissect the level 3 protocol, application level protocol and also if the url value is present in the packet. How best to achieve this in C?

for a basic ascii checker code of less than 10 lines , i want to print out stuff immediately , instead of after a newline. i understand that stdout is a bufferedstream , and so it will by default wait for a '\n'. i was looking at [this](http://stackoverflow.com/questions/1716296/why-does-printf-not-flush-after-the-call-unless-a-newline-is-in-the-format-strin) page for …

#include<stdio.h> #include<conio.h> struct Book { char bname[20]; int pages; char author[20]; float price; }b1[3]; void main() { struct Book b1[3]={ {"BOOK1",700,"ypk",12.98}, {"BOOK2",500,"aak",350.00}, {"BOOk3",120,"HST",450} }; for(int i=0;i>3;i++) printf("%d\n",b1[i]); getch(); } iwant output book1 700 ypk 12.98 book2 500 aak 350.00 book3 120 hst 450.

Here is a code that creates two childern using fork. My question is how can we create mutiple grandchildern and great grandchildern at the same time . And the line 21 of code gives an unexpected output i.e instead on one parent id it gives three id's. Here is the …

I'm getting a syntax error that's confusing me beyond belief. I'm using MinGW on Windows XP(32-bit), and Notepad++ for a text editor. "Syntax error before unexpected token '('" Originally, I thought it may have been something in the code I was trying to compile, so I wrote a simple "hello …

I need help reading my arp replies. When writing requests to the socket, I cant get replies related to what I sent..Ideas #include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <netdb.h> #include <sys/socket.h> #include <arpa/inet.h> #include <linux/if_ether.h> #define ETH_HW_ADDR_LEN 6 #define IP_ADDR_LEN 4 #define ARP_FRAME_TYPE 0x0806 #define …

#include<stdio.h> #include<stdlib.h> #include<string.h> static int compare(const void *x,const void *y){ return strcmp(*(const char**)x, *(const char**)y); } int main(){ FILE *p = fopen("file.txt","w"); char ch = '\0',**c = (char**)calloc(6,sizeof(char*)); int n[6]={0},i=0,j=0; fprintf(p,"jack\nakki\njohn\nrachael\nrobin\ntom"); fclose(p); p = fopen("file.txt","r"); while(1){ while((ch=getc(p))!= '\n'){ if(ch == EOF) break; putchar(ch); n[i]++; } printf(" %d\n",n[i]); if(ch == EOF) …

I'm pretty comfortable with "C", but where I lack, is understanding what types of options must be passed to compiler to produce the tightest code possible. Here is an example of a formula in "C"; int ADDR = VIDEO_BASE + (WND_X + POS_X) + ((WND_Y + POS_Y) * SCR_X) * …

#include<stdio.h> #include<conio.h> #include<string.h> struct { int num1,num2; char s1; int *ptr; int abc[5]; }a[2]; void main() { int start, last; start=&a[1].num1;//error last=&a[0].num1;//error printf("\nsize of structure :%d bytes",start-last); getch(); } getch(); }

(int *)a why use poiunter with intger?

Sorry if this is hard to understand what I'm trying to do here, but, I do not know how to approach this. I am using method overloading in my constructors of a class, and I have multiple "Window" functions which are all classes that can be used and I need …

i have matrix which contains first column as index second and third as values in one c file and in other file [index operations] when i call the two files from the main program it should be [1 2 3 ] [1 Add] [1 5] file 1 file2 main program …

A prime number (or a prime) is a natural number greater than 1 that can only be divided by 1 and itself. Ex-First few Prime number are- 2, 3, 5, 7, 11, 13, 17, 19,... A digit prime is a prime number whose sum of digits is also prime. For …

I have an array of integers.Let's assume int a[5]={1,2,1,2,2};.I want to divide this array into two arrays by extracting some elements of array "a[5]" into some different arrays like "b[2]" and "c[3]",such that int b[2] will contain {1,2} and int c[3] will contain {1,2,2}. How can it be possible using …

I want to increase my logical skill for good programming, what should i do to do so ? How can i be a good programmer in C ? Please Help !!

explain malloc() function and its type casting how execute

Hello, in this code snippet I am not able to understand line 8 and 10. Here at line 8, char* is getting typecasted as int* then again, getting typecasted as char*. Please explain. #include<stdio.h> int main() { int arr[3] = {2,3,4}; char *p; p = arr; p = (char*)((int*) (p)); …

as with nmap we could scan the entire network siamilary i am looking for a c code which would do the scnning the entire host in the network. i hve got IP address ,subnet mask and networka ddress till now by my code. i would be highly obliged to you …

The output of this code is -1, 4, 4. I am not sure about this -1. Is it because when all bits are set then in decimal it means -1 ? #include<stdio.h> int main() { struct value { int bit1:1; int bit3:4; int bit4:4; }bit={1,4,4}; printf("%d %d %d",bit.bit1, bit.bit3, bit.bit4); …

The output of this code is char *str="char *str=%c%s%c;main(){printf(str,34,str,34);}";main(){printf(str,34,str,34);} I don't know how this is happening. Please explain. #include<stdio.h> char *str = "char *str=%c%s%c;main(){printf(str,34,str,34);}"; int main() { printf(str,34,str,34); return 1; }

Hello, I am not able to understand whats happening behind "ptr-p", "*ptr-arr". Please explain #include<stdio.h> int main() { static int arr[]={0,1,2,3,4}; int *p[]={arr,arr+1,arr+2,arr+3,arr+4}; int **ptr=p; ptr++; printf("\n %d %d %d \n",ptr-p,*ptr-arr,**ptr); *ptr++; printf("\n %d %d %d \n",ptr-p,*ptr-arr,**ptr); *++ptr; printf("\n %d %d %d \n",ptr-p,*ptr-arr,**ptr); ++*ptr; printf("\n %d %d %d \n",ptr-p,*ptr-arr,**ptr); return …

I have this code: typedef struct { int a } array[1]; int main (array var) { if ((var->a) == 0) return 0; } and I want to copy var to a new variable. It seems it should be something like typedef struct { int a } array[1]; int main (array …

Hi, I am using gcc compiler to compile the program and build an exe I used this command to compile gcc program.cpp -g -o program (generates program.exe and runs fine) But, if i write the same thing in system("gcc program.cpp -g -o program"); programmatically, then the exe is generated but, …

According to the Gregorian calendar it was monday on the date 01/01/01. if any year is input through the keyboard write a program to find out what is the day on 1st January of this year?

I have learned a few programming languages and am now in the beginning stages of teaching myself C with "C Programming, Second Edition for the absolute beginner". I'm enjoying the book but have run into some difficulties in the second chapter exercies. The exercise states as follows: Create a program …

int arr[]={12,17}; printf("\n arr = %d , &arr= %d",arr,&arr); printf("\n arr+1 = %d , &arr + 1= %d",arr+1,&arr+1); getch(); } ans : arr=400 &arr=400 arr+1=402 &arr+1=404 Please tell me how &arr and &arr+ 1 works?