#include <iostream>

#include <stdio.h>

#include <vector>

#include <unistd.h>

#include <sys/types.h>

//execute shell command

//执行一个shell命令，输出结果逐行存储在resvec中，并返回行数

int32_t myexec(const char *cmd, std::vector<std::string> &resvec) {

    resvec.clear();

    FILE *pp = popen(cmd, "r"); //建立管道

    if (!pp) {

        return -;

    }

    char tmp[]; //设置一个合适的长度，以存储每一行输出

    while (fgets(tmp, sizeof(tmp), pp) != NULL) {

        if (tmp[strlen(tmp) - ] == '\n') {

            tmp[strlen(tmp) - ] = '\0'; //去除换行符

        }

        resvec.push_back(tmp);

    }

    pclose(pp); //关闭管道

    return resvec.size();

}

int main(int argc, const char * argv[]) {

    std::vector<std::string> *vect = new std::vector<std::string>();

    pid_t pid = getpid();

    char *cmd = new char[];

    sprintf(cmd, "ps -p %d -o 'pid,pcpu,rss'",pid);

    std::cout<< cmd << std::endl;

    int32_t a = myexec(cmd, *vect);

    std::cout<< a << std::endl;

    int i = ;

    int count = vect->size();

    for (; i < count; i++) {

        std::cout<< (*vect)[i] <<std::endl;

    }

    return ;

}