c语言初学者遇到结构体的问题

Question

为啥会这样捏

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
struct cyl {
    int r[8];//外圆半径    
    int rh[8];//内圆半径
    int h[8];//圆柱体高
};
int main() {
    struct cyl a1;
    printf("输入外圆半径；\n");
    scanf("%d", &a1.r);
    printf("输入内圆半径；\n");
    scanf("%d", &a1.rh);
    printf("输入圆柱体高；\n");
    scanf("%d", &a1.h);
    printf("外圆半径；%d\n",a1.r);
    printf("内圆半径；%d\n", a1.rh);
    printf("圆柱体高；%d\n", a1.h);


    
    return 0;
    
}

Answer 1

 
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
struct cyl {
    int r;//外圆半径    
    int rh;//内圆半径
    int h;//圆柱体高
};
int main() {
    struct cyl a1;
    printf("输入外圆半径；\n");
    scanf("%d", &a1.r);
    printf("输入内圆半径；\n");
    scanf("%d", &a1.rh);
    printf("输入圆柱体高；\n");
    scanf("%d", &a1.h);
    printf("外圆半径；%d\n",a1.r);
    printf("内圆半径；%d\n", a1.rh);
    printf("圆柱体高；%d\n", a1.h); 
    
    return 0;
    
}