C Tutorial/stdio.h/fwrite

fwrite

Item Value Header file stdio.h Declaration size_t fwrite(const void *buf, size_t size, size_t count, FILE *stream); Function writes count number of objects. Return returns the number of items written on success. Fewer items written means failure.

<source lang="cpp">#include <stdio.h>

 #include <stdlib.h>
 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;
 }</source>