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Fprintf

Item Value Header#include Declarationint fprintf(FILE *stream, const char *format, ...); Functionoutputs the values to the stream. Returnreturns the number of characters actually printed on success or a negative number on failure. 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;   }