#include <stdio.h>
int printf(const char *format, ...);
int fprintf(FILE *stream, const char *format, ...);
int dprintf(int fd, const char *format, ...);
int sprintf(char *str, const char *format, ...);
int snprintf(char *str, size_t size, const char *format, ...);
1 # include <stdio.h> 2 # include <stdlib.h>
3 int main(void) {
4 char s[100] = {0,};
5
6 sprintf(s, "ls %s", "-al");
7 system(s);
8
9 return 0;
10 }
