输入三个数字，使用指针，是三个数字按从小到达输出

#include "stdio.h"void sort(int *, int *, int *);void main(){int a, b , c, *pointer_1, *pointer_2, *pointer_3;pointer_1 = &a;pointer_2 = &b;pointer_3 = &c;printf ("input 3 numbers:");scanf ("%d,%d,%d", &a, &b, &c);sort(pointer_1, pointer_2, pointer_3);printf ("%d,%d,%d\n", *pointer_1, *pointer_2, *pointer_3);}void sort(int *p1, int *p2, int *p3){int t;if ( *p1 > *p2){ t = *p1; *p1 = *p2; *p2 = t;}if ( *p1 > *p3){ t = *p1; *p1 = *p3; *p3 = t;}if ( *p2 > *p3){ t = *p2; *p2 = *p3; *p3 = t;}}