用Switch和default求银行利率，c语言

#include<stdio.h>
int main()
{
float money,r,sum;
int month = 0;
scanf_s("%f,%d", &money, &month);
switch (month)
{
case 1:r = 0.005; break;
case 2:r = 0.006; break;
case 3:
case 4:r = 0.0065; break;
case 5:
case 6:
case 7:r = 0.008; break;
default:r = 0.01;
}
sum =money12r+money;
printf("%f\n", sum);
}
求大佬看看，不知道哪里出了问题

scanf_s 改为scanf吧
sum =money12r+money也有问题

sum += money*12*r;

scanf_s("%f,%d", &money, &month);这一行将%f,%d逗号去掉就行了感谢各位