三人選舉

#include <iostream>

using namespace std;

int main()
{
    int a=0, b=0, c=0, people=0, choose;
    do
    {
        printf("Enter choose (a=1, b=2,c=3,-1 to end): ");
        scanf("%d", &choose);
        switch(choose)
        {
        case 1:
            a++; people++; break;
        case 2:
            b++; people++; break;
        case 3:
            c++; people++; break;
        case -1:
            break;
        default:
            printf("Please enter a valid number.\n");
        }
    } while (choose != -1);
    printf("a\tb\tc\tpeople\n%d\t%d\t%d\t%d\n", a, b, c, people);
    if (a>b && a>c)
        printf("The city leader is a\n");
    else if (b>a && b>c)
        printf("The city leader is b\n");
    else if (c>a && c>b)
        printf("The city leader is c\n");
    else
        printf("This city has no leader.\n");
    system("pause");
    return 0;
}