常见的函数样式有4种,即在函数定义过程中函数的四种格式,他们也分别对应了四种调用方法:
1,无参无返
2,有参无返
3,无参有返
4,有参有返
示例:
#include<bits/stdc++.h>
using namespace std;
//无参无返
void test01(){cout<<"this is test01"<<endl;
}
//有参无返
void test02(int a){cout<<"this is test02 a= "<<a<<endl;
}
//无参有返
int test03(){cout<<"this is test03"<<endl;return 100;
}
//有参有返
int test04(int a){cout<<"this is test04 a="<<a<<endl;return a;
}
int main(){//无参无返调用 test01();//有参无返调用 test02(100);//无参有返调用 int num1=test03();cout<<"num1= "<<num1<<endl;//有参有返调用 int num2=test04(10000);cout<<"num2= "<<num2<<endl;
}
结果: