C/stdio.h/putc
putc: writes a character to the output stream
//Header file: #include <stdio.h>
//Declaration: int putc(int ch, FILE *stream);
//Return: returns the character written on success and EOF on error.
#include <stdio.h>
int main(void){
FILE *fp;
if((fp=fopen("test", "w"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
char *str = "www.java2s.com";
for(; *str; str++){
putc(*str, fp);
}
}