Question

我已经为它制作了一个代码，但它非常差。我想知道如何更快地获得所有整数和总和。谢谢:)）

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
using namespace std;
int main()
{
    int d, m, s, b = 0, l = 0, vm, vs, mv, ms;;
    ifstream file("File.txt");
    if (file.is_open())
    {
        file >> d;
        cout << d << endl;
        file >> m >> s;
        cout << m << " " << s << endl;
        b += m;
        l += s;
        file >> m >> s;
        cout << m << " " << s << endl;
        b += m;
        l += s;
        file >> m >> s;
        cout << m << " " << s << endl;
        b += m;
        l += s;
        file.close();
    }
    else cout << "File has not opened." << endl;
    return 0;
}

Answer 1

你想要达到的目标并不是很清楚。我假设您需要2个部分总和。您可以做的是将if块的所有内容替换为：

file >> d; // read the first number
cout << d << endl;
while(file >> m >> s) // keep reading 2 numbers
{
    b += m;
    l += s;
    cout << m << " " << s << endl;
}

无需手动关闭文件，析构函数将在程序结束时自动处理（范围）。

如何从文本文件中读取并获取整数之和？

1 个答案: