c语言中录入指定人数成绩、统计成绩分布

#include <stdio.h>
# define NUMBER 80

int main(void)
{
    int a[NUMBER];
    int number;
    
    puts("please input the number of the student.");
    do
    {
        printf("number of student = ");
        scanf("%d", &number);
        if (number < 1 | number > NUMBER)
        {
            printf("\athe san of number is 1-%d\n", NUMBER);
        }
    }
    while ( number < 1 | number > NUMBER);
    
    printf("please input %d student scores.\n", number);
    int i;
    for (i = 0; i < number; i++)
    {
        do
        {
            printf("%dst = ", i + 1);
            scanf("%d", &a[i]);
            if (a[i] < 0 | a[i] > 100)
                printf("the score range is 0-100\n");
        }
        while (a[i] < 0 | a[i] > 100);    
    }
    puts("-----\n-----\n-----");
    
    int b[11] = {0};
    for (i = 0 ; i < number; i++)
    {
        if (a[i]/10 == 0)
        b[0]++;
        if (a[i]/10 == 1)
        b[1]++;
        if (a[i]/10 == 2)
        b[2]++;
        if (a[i]/10 == 3)
        b[3]++;
        if (a[i]/10 == 4)
        b[4]++;
        if (a[i]/10 == 5)
        b[5]++;
        if (a[i]/10 == 6)
        b[6]++;
        if (a[i]/10 == 7)
        b[7]++;
        if (a[i]/10 == 8)
        b[8]++;
        if (a[i]/10 == 9)
        b[9]++;
        if (a[i]/10 == 10)
        b[10]++;
    }
    
    puts(" destribution plot  ");
    printf("   100: ");
    for (i = 0; i < b[10]; i++)
        putchar(‘*‘);
        putchar(‘\n‘); 
    
    int j;    
    for (i = 9; i >=0; i--)
    {
        printf("%d-%d", i * 10, i * 10 + 10);
        putchar(‘:‘);
        for (j = 0; j < b[i]; j++)
            putchar(‘*‘);
            putchar(‘\n‘);
     } 
    return 0;
    
}