Title Set 7-14 seeking basic programming and integer section (15 minutes)

#include <stdio.h>
int main()
{
    int a, b, i, cnt = 0, sum = 0;
    scanf("%d %d", &a, &b);
    for (i = a; i <= b; i++)
    {
        printf("%5d", i);           //占5个字符宽
        cnt++;                      //每输出一次，计数器累加1
        if (cnt % 5 == 0 && i != b) //如果当前计数器的值能被5整除那么换行
            printf("\n");
    }
    printf("\n");
    for (i = a; i <= b; i++)
        sum += i;
    printf("Sum = %d", sum);
    return 0;
}