Question

String cmd = "/alcatel/omc3/osm/script/proc_upd.pl -s stop -p MFSUSMCTRL -u" + userName;      
system(cmd);

我想打印system()函数的输出。我怎么能这样做？

Answer 1

您可以使用popen功能。它将允许您获取命令的结果。您必须在代码中添加#include <stdio.h>才能使用此代码。基本语法是FILE * file_name = popen("command", "r")。您的代码可能类似于：

#include <iostream>
#include <stdio.h>
using namespace std;

char buf[1000];
string userName;

int main() {

    cout << "What is your username?\nUsername:";

    //input userName
    cin >> userName;

    //declare string strCMD to be a command with the addition of userName
    string strCMD = "/alcatel/omc3/osm/script/proc_upd.pl -s stop -p MFSUSMCTRL -u" + userName;

    //convert strCMD to const char * cmd
    const char * cmd = strCMD.c_str();

    //execute the command cmd and store the output in a file named output
    FILE * output = popen(cmd, "r");

    while (fgets (buf, 1000, output)) {
        fprintf (stdout, "%s", buf);
    }
    pclose(output);
    return 0;
}

如何用C ++打印system（）输出？

1 个答案: