题解 | #牛牛的短信#

#include <stdio.h>
float add(int arr[], int a);
int main()
{
    //这里要用到数组，因为函数会销毁
    int arr[100] = {0}, n = 0, i = 0;
    float  count = 0;
    scanf("%d",&n);
    for(i = 0;i < n; i++)
    {
        scanf("%d",&arr[i]);
    }
    count = add(arr,n);
    printf("%.1f",count);
    return 0;
}
float add(int arr[10], int a)
{
    int i = 0;
    float x = 0, sum = 0;
    for(i = 0; i < a; i++)
    {
        if(arr[i] <= 60)
          x = 0.1;
        else
          x = 0.2;
        sum = sum + x;
    }
    return sum;
}