Question

我需要帮助我的代码！对我来说它看起来很好但是它不起作用。我已经尝试过，但我无法弄清楚什么是错的。

我还需要另一个计算方面的帮助。我输入2和4，它应该计算2 * 2 + 3 * 3 + 4 * 4。如果我输入1和3它应该是1 * 1 + 2 * 2 + 3 * 3，我希望你理解！

#include <iostream> 
#include <math.h>
using namespace std;

void sort(float & tal1, float & tal2);

int main() {
    float x, y;
    int sum, i, a, m, val;
    cout << "Give to numbers: " << endl;
    cout << "Type one number \n";
    cin >> x;
    cout << "Type another number \n";
    cin >> y;
    if (x > y) {
        sort(x, y);
    }
    cout << x << " och " << y << endl;
    cout << "Choose between a and m! " << endl;
    cin >> val;
    if (val == 'a') {
        sum = 0;
        for (int i = x; i <= y; i++)
            sum += i;
        cout << "Sum = " << sum << endl;
    } else if (val == 'm') {
        sum = 1;
        for (int i = x + 1; i < y; i++) {
            sum *= i;
            cout << "Sum = " << sum << endl;
        }
    }
}

void sort(float & tal1, float & tal2) {
    float temp = tal1;
    tal1 = tal2;
    tal2 = temp;
}

Answer 1

for( int i = x ; i <= y ; i++ ){

        sum +=i;
        cout << "Sum = "<< sum <<endl;
    }

这应该改为

for( int i = x ; i <= y ; i++ ){

        sum +=(i*i);
        cout << "Sum = "<< sum <<endl;
    }

Answer 2

我想你必须修改else分支来检查val是否是＆＃34; m＆＃34;

else if (val == 'm')
{
    sum = 0;
    for (int i = x; i <= y; i++)
    {
        sum += i*i;
        cout << "Sum = "<<sum<<endl;
    } 

}

我的IF语句和计算的提示

2 个答案: