c++函数常见样式

c++函数常见样式

#include <iostream> #include <time.h> using namespace std; void test01() { cout<<"无参无返"<<endl; } void test02(int a) { cout<<"有参无返"<<endl; } int test03() { cout<<"无参有返"<<endl; return 100; } int test04(int a) { cout<<"有参有返"<<endl; return a; } int main() { time_t now1=time(0); //函数常见样式 //1.无参无返 test01(); //2.有参无返 int b=100; test02(b); //3.无参有返 int c=test03(); cout<<c<<endl; //4.有参有返 int a=1000; a=test04(a); cout<<a<<endl; time_t now2=time(0); cout<<"程序运行时间："<<now2-now1<<endl; }