计算器

#include<stdio.h>
double jisuanqi(double  a , double b ,char  c)
{
    if(c=='+')
    {
    return a+b;
    }
    else if(c == '-')
    {
        return a-b;
        }
        else if(c == '*')
        {
            return a*b;
            }
            else if(c == '/')
            {

            if(b==0)
            {
                printf("chushubunengwei 0\n");
                return 0;
                }
                else
                {
                    return a/b;
                    }
                }
                else
                {
                    printf("ni de shu ru you chuo\n");
                    return 0;
                }
            }

     int main()
        {
            double a,b;
            char c;
            scanf("%lf%c%lf", &a , &c,&b);
            printf("%lf\n" ,jisuanqi(a,b,c));


        return 0;
    }