#include    <stdio.h>
#include    <string.h>

void main()
{
char    str[512],*ptr;
FILE    *fp;

    if((fp=popen("ls -1","r"))==NULL){
        fprintf(stderr,"error!!!\n");
        exit(-1);
    }

    while(1){
        fgets(str,512,fp);
        if(feof(fp)){
            break;
        }
        ptr=strchr(str,'\n');
        if(ptr!=NULL){
            *ptr='\0';
        }
        printf("%s\n",str);
    }

    pclose(fp);
}