百分制转五分制.cpp

解压后 每个.cpp都有中文名很清楚。我是初学者

#include<stdio.h>
#include<stdlib.h>
void main()
{
    int mark;
again:
	printf("Enter a mark: ");
	scanf("%d",&mark);
	if (mark>100 || mark<0)
	{	printf("The wrong mark!! Enter again.\n");
    	goto again;
    }
	if (mark==100)
	{	printf("Well done!!!\n");
        exit(0);
    }
	switch (mark/10%10)
	{
	case 9:
		printf("\nYou got A !\n");
		break;
    case 8:
		printf("\nYou got B !\n");
		break;
    case 7:
		printf("\nYou got C !\n");
		break;
    case 6:
		printf("\nYou got D !\n");
		break;
    case 5:case 4:case 3: case 2:case 1: 
		printf("\nYou got E !!\n");
		break;
    case 0:
		printf("\nYou are foolish!\n");
		break;
    }

 }