//Header: #include <stdio.h>
//Declaration: int fflush(FILE *stream);
//Return: 0 on success or EOF on error.
#include <stdio.h>
#include <stdlib.h>
int main(void){
FILE *fp;
if((fp=fopen("test", "rb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
char ch = 'C';
int i;
for(i=0; i<5; i++) {
fwrite(ch, sizeof(ch), 1, fp);
fflush(fp);
}
fclose(fp);
return 0;
}
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