求解 哪里有问题 哪里错了

Question

#include <stdio.h>
int main()
{
int score, degree, No_stu, i = 1;
printf("please input the No. of class:");
scanf_s("%d", &No_stu);
while (i <= No_stu)
{
printf("please input score:");
scanf_s("%d", &score);
if (score < 0 || score >100)
{
printf("score is illegal!\n");
continue;
}
degree = (int)(score / 10);
for (;degree == 10 || degree == 9;)
{
printf("corresponding degree is A\n");
break;
}
for (;degree = 8;)
{
printf("corresponding degree is B\n");
break;
}
for (;degree = 7;)
{
printf("corresponding degree is C\n");
break;
}
for (;degree = 6;)
{
printf("corresponding degree is D\n");
break;
}
for (;degree < 6;)
{
printf("corresponding degree is E\n");
break;
} i++;

return 0;

}
题目要求是这样的
从键盘输入一个班的成绩，把百分制转换成等级制。将百分制成绩（用score表示）除以10之后再取整，一定得到0到10之间的数。910对应’a’,8对应‘b‘,543210对应’e’既不及格。

Answer 1

i++; 和 return 0; 之间加一个 }
代码排整齐之后看的比较清楚