C++ 實例 - 交換兩個數
C++ 實例以下我們使用兩種方法來交換兩個變數：使用臨時變數與不使用臨時變數。
實例 - 使用臨時變數
#include <iostream>
using namespace std;
int main()
{
int a = 5, b = 10, temp;
cout << "交換之前：" << endl;
cout << "a = " << a << ", b = " << b << endl;
temp = a;
a = b;
b = temp;
cout << "\n交換之後：" << endl;
cout << "a = " << a << ", b = " << b << endl;
return 0;
}
以上程式執行輸出結果為：
交換之前： a = 5, b = 10 交換之後： a = 10, b = 5
實例 - 不使用臨時變數
#include <iostream>
#include <iostream>
using namespace std;
int main()
{
int a = 5, b = 10;
cout << "交換之前：" << endl;
cout << "a = " << a << ", b = " << b << endl;
a = a + b;
b = a - b;
a = a - b;
cout << "\n交換之後：" << endl;
cout << "a = " << a << ", b = " << b << endl;
return 0;
}
以上程式執行輸出結果為：
交換之前： a = 5, b = 10 交換之後： a = 10, b = 5