Simple CGI Programming in C

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

int main(void)
{
    char *data;

    printf("Content-Type:text/html;xdxa"); // HTML out start !!

    printf("<TITLE>Multiplication results</TITLE> ");
    printf("<H3>Multiplication results</H3> ");

    data = getenv("QUERY_STRING"); // getting parameters

    if(data == NULL)
      printf("<P>No Query string found");
    else
      printf("<P>%s", data);

    return 0;
}

http://127.0.0.1/cgi-bin/test.exe

http://127.0.0.1/cgi-bin/test.exe?helloworld