Assessment of students ' grades: less than 60 is "E", 60~69 is "D", 70~79 is "C", 80~89 is "B", and more than 90 is "A"

#define RET_OK 1
#define RET_ERR 1


int judge_score (int score,char *ch)
{
if (Score > | | Score < 0)
{
printf ("The score you input should little than 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;
}


int main (int argc,char argv[])
{
Char score = 0;
char ch = ' 0/';

while (scanf ("%d", &score)! = ' Q ')
{
Judge_score (SCORE,&AMP;CH);
printf ("\r\nresult:%c\r\n", ch);
}

return RET_OK;
}

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Assessment of students ' grades: less than 60 is "E", 60~69 is "D", 70~79 is "C", 80~89 is "B", and more than 90 is "A"