ZOJ 3782: Ternary Calculation

///@author Sycamore, ZJNU
///@accepted_on 2017-01-17
#include<iostream>
using namespace std;
int main()
{
    int T;
    cin >> T;
    while (T--)
    {
        int x, y, z;
        char c1, c2;
        cin >> x >> c1 >> y >> c2 >> z;
        int ans;
        if (c1 == ‘*‘)
        {
            ans = x * y;
            switch (c2)
            {
            case ‘+‘:
                ans += z;
                break;
            case ‘-‘:
                ans -= z;
                break;
            case ‘*‘:
                ans *= z;
                break;
            case ‘/‘:
                ans /= z;
                break;
            case ‘%‘:
                ans %= z;
                break;
            }
        }
        else if (c1 == ‘/‘)
        {
            ans = x / y;
            switch (c2)
            {
            case ‘+‘:
                ans += z;
                break;
            case ‘-‘:
                ans -= z;
                break;
            case ‘*‘:
                ans *= z;
                break;
            case ‘/‘:
                ans /= z;
                break;
            case ‘%‘:
                ans %= z;
                break;
            }
        }
        else if (c1 == ‘%‘)
        {
            ans = x%y;
            switch (c2)
            {
            case ‘+‘:
                ans += z;
                break;
            case ‘-‘:
                ans -= z;
                break;
            case ‘*‘:
                ans *= z;
                break;
            case ‘/‘:
                ans /= z;
                break;
            case ‘%‘:
                ans %= z;
                break;
            }
        }
        else if (c2 == ‘*‘)
        {
            ans = y * z;
            if (c1 == ‘+‘)
            {
                ans += x;
            }
            else ans = x - ans;
        }
        else if (c2 == ‘/‘)
        {
            ans = y / z;
            if (c1 == ‘+‘)
            {
                ans += x;
            }
            else ans = x - ans;
        }
        else if (c2 == ‘%‘)
        {
            ans = y % z;
            if (c1 == ‘+‘)
            {
                ans += x;
            }
            else ans = x - ans;
        }
        else
        {
            switch (c1)
            {
            case ‘+‘:
                ans = x + y;
                break;
            case ‘-‘:
                ans = x - y;
                break;
            case ‘*‘:
                ans = x*y;
                break;
            case ‘/‘:
                ans = x / y;
                break;
            case ‘%‘:
                ans = x%y;
                break;
            }
            switch (c2)
            {
            case ‘+‘:
                ans += z;
                break;
            case ‘-‘:
                ans -= z;
                break;
            case ‘*‘:
                ans *= z;
                break;
            case ‘/‘:
                ans /= z;
                break;
            case ‘%‘:
                ans %= z;
                break;
            }
        }
        cout << ans << endl;
    }
    return 0;
}