求用c++编的投票程序

#include<stdio.h>
void main()
{
int i,k1,k2,k3;
k1=k2=k3=0;
printf("input number:");
scanf("%d",&i);
while(i!=-1)
{
switch(i){
case 1:k1++;break;
case 2:k2++;break;
case 3:k3++;break;
default:printf("input error!\n");
}
printf("input number:");
scanf("%d",&i);
}
printf("the first man's ticket:%d\n",k1);
printf("the second man's ticket:%d\n",k2);
printf("the third man's ticket:%d\n",k3);
}