计算器。。

#include <stdio.h>
double calcutotor(double a,double b,char operator)
{
    if(operator=='+')
    {
        return a+b;
    }
    else if(operator=='-')
    {
        return a-b;
    }
    else if(operator=='*')
    {
        return a*b;
    }
    else if(operator=='/')
    {
        if(b==0)
        {
            printf("chu shu bu neng wei 0\n");
        }
        else
        {
            return a/b;
        }
    }
    else
    {
        printf("shu ru bu zai fan wei nei\n");
    }
    return 0;
}
int main()
{
    double a,b;
    char operator;
    scanf("%lf%c%lf",&a,&operator,&b);
    {
        printf("%lf\n",calcutotor(a,b,operator));
    }
    return 0;
}