C/stdio.h/fprintf

fprintf: outputs the values to the stream

<source lang="cpp">

//Header: #include <stdio.h> //Declaration: int fprintf(FILE *stream, const char *format, ...); //Return: returns the number of characters printed on

               success or a negative number on failure. 

 #include <stdio.h>
 #include <stdlib.h>
 int main(void)
 {
   FILE *fp;
   if((fp=fopen("test", "wb"))==NULL) {
     printf("Cannot open file.\n");
     exit(1);
   }
   //The format control string are identical to those in printf();
   fprintf(fp, "this is a test %d %f", 10, 20.01);
   fclose(fp);
   return 0;
 }
          
      </source>