学步园

#include<unistd.h>
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<iostream>
using namespace std;
int main()
{
        FILE *readfp;
        char buffer[100];
        int charsread;
        memset(buffer,'\0',sizeof(buffer));
        readfp=popen("uname -a","r");
        if(NULL!=readfp)
        {
                charsread=fread(buffer,sizeof(char),99,readfp);
                if(0<charsread)
                {
                        char *p=buffer;
                        while(*p)
                                {cout<<*p;p++;}
                        cout<<endl;
                }
                pclose(readfp);
                exit(EXIT_SUCCESS);
        }
        exit(EXIT_FAILURE);
}
~    

2.利用管道，读取另一个进程（uname -a）的输出结果；