int judge_score(int score,char *ch)
{
if(score > 100 || score < 0)
{
printf("The score you input should little than 100 and bigger than 0\n");
return ret_err;
}
switch(score/10)
{
case 10:
case 9:
*ch = ‘A‘;
break;
case 8:
*ch = ‘B‘;
break;
case 7:
*ch = ‘C‘;
break;
case 6：
*ch = ‘D‘;
break;
default:
*ch = ‘E‘;
break;
}
return ret_ok;
}
