#include <stdio.h>
#include <string.h>
#include <unistd.h>
int main () {
char buff[1024];
memset( buff, '\0', sizeof( buff ));
fprintf(stdout, "Going to set full buffering on\n");
setvbuf(stdout, buff, _IOFBF, 1024);
fprintf(stdout, "This is yiibai.com\n");
fprintf(stdout, "This output will go into buff\n");
fflush( stdout );
fprintf(stdout, "and this will appear when programm\n");
fprintf(stdout, "will come after sleeping 5 seconds\n");
sleep(5);
return(0);
}