Fun Examples

Well I want to start a thread that will unify (hehe) the board by asking everyone to "donate" a small or large program that does absolutely nothing useful or something that could be a lifesaver. Yes I know that you can go to planetsourcecode.com and find every little goody that you want but this is to unify everyone (hehe). This will help people who like to look at code and see better ways of doing a certain task. So come one come all and share.

Almost forgot to post mine.

This is a simple filter type program for text files.

Code:

#include<ctype.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

main(int argc, char *argv[]){
FILE *fd,*out;
int ch,c=0;
if(argc<2){
    printf("Usage: Filter <filename><outfile.txt>\n");
    exit(1);
    }
strcat(argv[1],".txt");
strcat(argv[2],".txt");
if((fd=fopen(argv[1],"r"))==NULL){
    printf("Could not open %s\n",argv[1]);
    exit(1);
    }
if((out=fopen(argv[2],"w"))==NULL){
    printf("Could not open\n");
    exit(1);
    }
while((ch=fgetc(fd))!=EOF){
    if(isalpha(ch))
    {
        if ((toupper(ch) >= 'A') && (toupper(ch) <= 'M'))
            ch = ch + 13;
        else
            ch = ch - 13;
    }
fputc(ch,out);
c++;
}
fclose(fd);
fclose(out);
printf("Filter complete with %d bytes read.\n",c);
exit(0);
}

Here's 15 of them. I'm not saying they're the best, but, there, I donated. Some need a little work and quite a few are targeted for Windows. You can however modify them to be better in the portability area.

...does absolutely nothing useful... This will help people who like to look at code and see better ways of doing a certain task. So come one come all and share.

Code:

int main ( void )
{
    return 0;
}

Quzah.

Code:

int main(void)
{
  for(;; ) {
    printf("Welcome to infinity!\n");
  }

  return 0;
}

I was going to submit this areaprog.c to the program challange at hdc. The challange was to calculate the area of circle square triangle and hexagon. The orignal poster did ask for 3d stuff but since circles squares and triangles and hexagons are 2d. Here it is.


/* AreaProg.c by kryptkat */

#include<stdio.h>
#include<math.h>
#define pi 3.14159265358979
#define a 2.958
int main()
{

double base;
double d;
double radius;
double height;
printf(" Radius of Circle\n");
scanf("%f", &radius);
printf(" Width\n");
scanf("%f", &base);
printf(" Height\n");
scanf("%f", &height);

d = (pow(base,2) * pi);
printf(" Area of Circle is %f \n", d);
d = pow(base,2);
printf(" Area of Square is %f \n", d);
d = (base * (height * 0.5) );
printf(" Area of Triangle is %f \n", d);
d = (pow(base,2) * a);
printf(" Area of Hexagon is %f \n", d);
return 0;
}

This *could* be useful for outputting text in teletype mode I suppose, so you guys decide. :P

Code:

#include <stdio.h> 
#include <time.h>

void sleep( clock_t wait );

int main(void)
{
    int count;
    char message[] = "\nSome string to print.";
		
    printf("For grins, let's see what this does.");
	
    for(count = 0; message[count] != '\0'; count++)
    {
        putchar(message[count]);
        sleep( (clock_t)1 * CLOCKS_PER_SEC );
    }
    
     return 0;
} 

void sleep( clock_t wait )
{
   clock_t goal;
   goal = wait + clock();
   while( goal > clock() )
      ;
}

just have a look at www.ioccc.org or
http://www0.us.ioccc.org/years.html#1998_fanf
if you are searching for amazing code snippets