fprintf : fprintf « stdio.h « C Tutorial

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C Tutorial » stdio.h » fprintf

22.10.1.fprintf

Item	Value
Header	#include
Declaration	int fprintf(FILE stream, const char format, ...);
Function	outputs the values to the stream.
Return	returns 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;

  }

22.10.fprintf
	22.10.1.	fprintf

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