C++ 实例 - 交换两个数
以下我们使用两种方法来交换两个变量:使用临时变量与不使用临时变量。
实例 - 使用临时变量
#include <iostream>
using namespace std;
int main()
{
int a = 5, b = 10, temp;
cout << "交换之前:" << endl;
cout << "a = " << a << ", b = " << b << endl;
temp = a;
a = b;
b = temp;
cout << "\n交换之后:" << endl;
cout << "a = " << a << ", b = " << b << endl;
return 0;
}
以上程序执行输出结果为:
交换之前: a = 5, b = 10 交换之后: a = 10, b = 5
实例 - 不使用临时变量
#include <iostream>
#include <iostream>
using namespace std;
int main()
{
int a = 5, b = 10;
cout << "交换之前:" << endl;
cout << "a = " << a << ", b = " << b << endl;
a = a + b;
b = a - b;
a = a - b;
cout << "\n交换之后:" << endl;
cout << "a = " << a << ", b = " << b << endl;
return 0;
}
以上程序执行输出结果为:
交换之前: a = 5, b = 10 交换之后: a = 10, b = 5
spongebob
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不使用临时变量,使用异或的方法:
spongebob
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