| Value | Item |
| Header file | stdio.h |
| Declaration | int fputc(int ch, FILE *stream); |
| Function | writes the character 'ch' to the stream. |
| Return | returns the value of the character written on success or EOF on failure. |
For binary operations, you can use ferror() to determine whether an error has actually occurred.
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE *fp;
if((fp=fopen("test", "wb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
char *str = "www.java2s.com";
while(*str){
if(!ferror(fp)) {
fputc(*str++, fp);
}
}
fclose(fp);
}