#include <stdio.h>

int main(void)
{
    char s[200];
    FILE *fp;
    int i = 0;
    printf("Please input filename...");
    scanf("%s", s);
    fp = fopen(s, "r");
    while (fgets(s, 100, fp))
        printf("%3d:%s", ++i, s);
    return 0;
}