默认参数实践

注意：默认参数只能是参数列表的最后几项，并且是连续的

#include <iostream>
using namespace std;

//============================================================================
//总结：默认参数只能是后几位
//============================================================================


void add1(int a = 11, int b=22){
    cout<<a+b<<endl;
}
int add11(int a = 11, int b=22){
    return a+b;
}
void coutStr1(const char *s = "[字符串指针]"){
    cout << "输出指针字符串：" <<s<< endl;
}
void coutStr2(const char s[]= "[字符串数组]"){
    cout << "输出字符串数组：" <<s<< endl;
}

int main(){

    cout << "函数默认参数：" << endl;

    //cout << "加法计算结果为：" <<(long)add1<< endl;
    cout << "加法计算结果为：" <<add11<< endl; // 是地址
    cout << "加法计算结果为：" <<add11()<< endl;
    cout << "加法计算结果为：" <<(*add11)()<< endl;
    cout << "加法计算结果为：" <<add11(222)<< endl;
    //cout << "coutStr1：" <<coutStr1<< endl;
    coutStr1();
    //cout << "coutStr2：" <<coutStr2<< endl;
    coutStr2();

    cout << "end." << endl;

    return 0;
}