main.cpp

#include <iostream>
using namespace std;
int main(int argc, char *argv[]) {
    cout<<"你输入了"<<argc-1<<"个参数"<<endl;
    if(argc==1)
        return 0;
    if(argc==2)
        cout << "读入图片" << argv[1] << endl;
    if(argc==3) {
        cout << "指定尺寸错误！\n";
        return 0;
    }
    if(argc==4){
        cout << "读入图片的大小为" << argv[2] << "*" << argv[3] << endl;
    }
    return 0;
}