我无法理解一件奇怪的事情.这是我的计划:
#include <iostream>
using namespace std;
void Swap(int *a , int *b)
{
int temp;
temp = *a;
*a = *b;
*b = temp;
}
int main()
{
int a=0;
int b=0;
cout<<"Please enter integer A: ";
cin>>a;
cout<<"Please enter integer B: ";
cin>>b;
cout<<endl;
cout<<"************Before Swap************\n";
cout<<"Value of A ="<<a<<endl;
cout<<"Value of B ="<<b<<endl;
Swap (&a , &b);
cout<<endl;
cout<<"************After Swap*************\n";
cout<<"Value of A ="<<a<<endl;
cout<<"Value of B ="<<b<<endl;
return 0;
}
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现在,如果你看一下"Swap"这个函数,我就用了"void Swap".因此它不能向main函数返回任何值(只有"int"返回一个值(至少这是我老师教给我的)).但是如果你执行它,值将在主函数中交换!怎么会 ?有谁能告诉我它是如何可能的?
这只是一个测试原型:
#include <iostream>
#include <string>
using namespace std;
int main()
{
int a=10;
char b='H';
string c="Hamza";
cout<<"The value of a is : "<<a<<endl;
cout<<"The value of b is : "<<b<<endl;
cout<<"The value of c is : "<<c<<endl<<endl;
cout<<"address of a : "<<&a<<endl;
cout<<"address of b : "<<&b<<endl;
cout<<"address of c : "<<&c<<endl;
return 0;
}
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为什么变量'b'的地址是字符类型,而不是打印?