1_1 输入成绩并计算总分和等级

#include<stdio.h>
void main()
{
    int score[4];
    int k;
    char subjects[4][10]={"English","maths","Science","Physics"};
    int totalmarks=0;
    printf("Please input the marks of different subjects like English,maths,Science and Physics:\n");
    for(k=0;k<4;k++)
    {
      scanf("%d",&score[k]);  //输入各科成绩并计算总成绩
      totalmarks=totalmarks+score[k];
    }
    printf("totalmarks=%d\n",totalmarks);

    //依次判断成绩等级
    for(int i=0;i<4;i++)
    {
      
      if(score[i]>=90)
      {
       printf("%s:Grade A\n",subjects[i]);
      }
     else if(score[i]>=75&&score[i]<90)
     {
      printf("%s:Grade B\n",subjects[i]);
     }
      else if(score[i]>=50&&score[i]<75)
     {
       printf("%s:Grade C\n",subjects[i]);
      }
     else
     {
      printf("%s:FAIL\n",subjects[i]);
     }
    }  
}