这个用c语言怎么写，求解答！

#include<stdio.h>
int findSumday(int year,int month,int day){
    int months[]  = {31,28,31,30,31,30,31,31,30,31,30,31};
    if ((year%4==0 && year%100!=0) || year%400==0){
        months[1]=29;
    }
    int sum = 0;
    for (int i=0;i<month-1;i++){
        sum += months[i];
    }
    sum += day;
    return sum;
}
int main(){
    int year=0,month=0,day=0;
    
    scanf("%d/%d/%d",&year,&month,&day);
    int num = findSumday(year,month,day);
    printf("%d",num); 
    return 0;
}