题解 | #学分绩点#

#include <iostream>
using namespace std;
const int num=11;
int credits[num];
int scores[num];

int main() {
    int n;
    while(cin>>n && n){
        
        int cre_sum=0;
        for (int i=0;i<n;i++){
            cin>>credits[i];
            cre_sum+=credits[i];
        }
        for (int i=0;i<n;i++){
            cin>>scores[i];
        }
        float gpa=0;
        for (int i=0;i<n;i++){
            if (scores[i]>=90 && scores[i]<=100) gpa+=4.0*credits[i];
            else if(scores[i]>=85 && scores[i]<=89) gpa+=3.7*credits[i];
            else if(scores[i]>=82 && scores[i]<=84) gpa+=3.3*credits[i];
            else if(scores[i]>=78 && scores[i]<=81) gpa+=3.0*credits[i];
            else if(scores[i]>=75 && scores[i]<=77) gpa+=2.7*credits[i];
            else if(scores[i]>=72 && scores[i]<=74) gpa+=2.3*credits[i];
            else if(scores[i]>=68 && scores[i]<=71) gpa+=2.0*credits[i];
            else if(scores[i]>=64 && scores[i]<=67) gpa+=1.5*credits[i];
            else if(scores[i]>=60 && scores[i]<=63) gpa+=1.0*credits[i];
            else gpa+=0;
        }
        float GPA=gpa/cre_sum;
        printf("%.2f",GPA);

    }
}