Stdio h C Tutorial

Item Value
Header filestdio.h
Declarationsize_t fwrite(const void *buf, size_t size, size_t count, FILE *stream);
Functionwrites count number of objects.
Returnreturns the number of items written on success. Fewer items written means failure.

#include 
  #include 
  int main(void)
  {
    FILE *fp;
    float f=12.23;
    if((fp=fopen("test", "wb"))==NULL) {
      printf("Cannot open file.\n");
      exit(1);
    }
    fwrite(&f, sizeof(float), 1, fp);
    fclose(fp);
    return 0;
  }