fprintf : fprintf « stdio.h « C Tutorial

1. C Tutorial
2. stdio.h
3. fprintf

The format control string are identical to those in printf();

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

  int main(void)
  {
    FILE *fp;

    if((fp=fopen("test", "wb"))==NULL) {
      printf("Cannot open file.\n");
      exit(1);
    }

    fprintf(fp, "this is a test %d %f", 10, 20.01);
    fclose(fp);

    return 0;
  }