7 grade=score/10; /*将成绩整除10,转化成switch语句中的case标号*/
8 switch (grade)
9 {
10 case 10:
11 case 9: printf("grade=A\n"); break;
12 case 8: printf("grade=B\n"); break;
13 case 7: printf("grade=C\n"); break;
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