C Exercise Example 66
100 cases of classic C language
Title: Enter the three numbers a, b, c, in order of size output.
Program analysis: use of method pointers.
Source Code:
// Created by www.w3big.com on 15/11/9. // Copyright © 2015年 本教程. All rights reserved. // # include<stdio.h> void swap(int *, int *); int main(void) { int a, b, c; int *p1, *p2, *p3; printf("输入 a, b ,c:\n"); scanf("%d %d %d", &a, &b, &c); p1 = &a; p2 = &b; p3 = &c; if(a>b) swap(p1, p2); if(a>c) swap(p1, p3); if(b>c) swap(p2, p3); printf("%d %d %d\n", a, b, c); } void swap(int *s1, int *s2) { int t; t = *s1; *s1 = *s2; *s2 = t; }
The above program execution output is:
输入 a, b ,c: 1 3 2 1 2 3