4.2重学C++之【常见函数样式】

#include<iostream>
using namespace std;


/*
    常见函数样式：
    无参无返
    有参无返
    无参有返
    无参无返
*/


// 1
void test1(){
    cout << "this is test1" << endl;
}
// 2
void test2(int a){
    cout << "this is test2 & a=" << a << endl;
}
// 3
int test3(){
    cout << "this is test3" <<endl;
    return 1000;
}
// 4
int test4(int a){
    cout << "this is test4" <<endl;
    return a*100;
}


int main(){
    test1();
    test2(6);
    int num1 = test3();
    cout << num1 << endl;
    int num2 = test4(100);
    cout << num2 << endl;


    return 0;
}