c语言编程，希望得到解决

#include<stdio.h>
int main() {
    int a,b,c;
    double s;
    printf("Input math1, English and math2:");
    scanf("%d,%d,%d",&a,&b,&c);
    s=(a*5.0+b*1.5+c*3.5)/10;
    printf("Final score = %.2f\n",s);
    return 0;
}