如何在C++代码中统计if条件为真的数量以计算用户得分

要统计用户答对的题目数量并展示总分，只需添加一个得分变量，每次用户答对时递增该变量即可。以下是修改后的完整代码，同时修复了原代码中提示信息的错误：

#include <iostream>
using namespace std;

int main()
{
    int num[4][4] 
    {
        {2,5,26,677} ,
        {2,3,7,5041} ,
        {1,2,3,4},
        {1,3,5,7} };
    
    int ans[4];
    int score = 0; // 初始化得分为0
    
    cout << "hello user.\n";
    cout << "write your answer" << endl;
    cout << "2, 5, 26 , ";
    cin >> ans[0];
    
    cout << "write your answer\n";
    cout << "2, 3, 7,  ";
    cin >> ans[1];
    
    cout << "write your answer\n";
    cout << "1, 2, 3, ";
    cin >> ans[2];
    
    cout << "hello user.\n";
    cout << "write your answer" << endl;
    cout << "1, 3, 5,";
    cin >> ans[3];
    
    // 检查第一题
    if (ans[0] == num[0][3]) {
        cout << "your first answer is right\n";
        score++; // 答对，得分+1
    }
    else {
        cout << "your first answer is wrong, the right answer is " << num[0][3] << "\n";
    }
    
    // 检查第二题
    if (ans[1] == num[1][3]) {
        cout << "your second answer is right\n";
        score++;
    }
    else {
        cout << "your second answer is wrong, the right answer is " << num[1][3] << "\n";
    }
    
    // 检查第三题
    if (ans[2] == num[2][3]) {
        cout << "your third answer is right\n";
        score++;
    }
    else {
        cout << "your third answer is wrong, the right answer is " << num[2][3] << "\n";
    }
    
    // 检查第四题
    if (ans[3] == num[3][3]) {
        cout << "your fourth answer is right\n";
        score++;
    }
    else {
        cout << "your fourth answer is wrong, the right answer is " << num[3][3] << "\n";
    }
    
    // 展示总分
    cout << "your score is " << score << endl;
}

关键修改点： #

• 添加int score = 0;初始化得分变量。
• 每答对一题执行score++，实现得分累加。
• 修正原代码中提示信息的错误（比如第一题误显示"second answer"）。
• 最后通过cout输出最终总分。
• 用num[i][3]替代硬编码的正确答案，提升代码可维护性。

内容的提问来源于stack exchange，提问作者omar benadada