Something

#include <stdio.h>
int main()
{
 printf("Content-type: text/html\n"); 
 printf("Pragma: no-cache\n");        
 printf("\n");                       
 printf("<html>\n");
 printf("  <body>\n");
 printf("    <h1 align=center>Hello, World!</h1>\n");
 printf("  </body>\n");
 printf("</html>\n");
 return 0;
}