C语言第三次作业

/*-----------------------------------------------
  名称:判断成绩等级 
  编写:钱钰   51131523
  班级:电子科学与工程学院 电子信息工程15班
  日期:14.10.21 
  内容:85-100 A;10-84 B;60-69;C;<60 D;
        1.首先多个数据输入,-1退出,分别使用switch和if 
------------------------------------------------*/
#include 
int main()
{
	int scores,i=1;//i用于记录数据个数 

	printf("Please enter the scores(-1 to quit):\n#1 : ");
	scanf("%d",&scores);

	while(scores!=-1)
	{

		if( scores <= 100 && scores >= 85 )
			printf("The Grade is: A\n");
		else if ( scores < 85 && scores >= 70 )
			printf("The Grade is: B\n");
		else if ( scores < 70 && scores >= 60 )
			printf("The Grade is: C\n");
		else if ( scores <60 && scores >= 0 )
			printf("The Grade is: D\n");  
	
			
		switch(scores/5)
		{
			case 20:    
			case 19:    
			case 18:
			case 17: printf("The Grade is:A\n");break;
			case 16:    
			case 15:
			case 14: printf("The Grade is:B\n");break;
			case 13:
			case 12: printf("The Grade is:C\n");break;
			default: printf("The Grade is:D\n");
		}   
		
		printf("#%d : ",i+1);//读入下一个成绩 
		scanf("%d",&scores);
		i++;
	}

	return 0;
}


 
 

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