Easy Tutorial
❮ C Function Isalpha C Standard Library String H ❯

C Exercise Example 66

C Language Classic 100 Examples

Title: Input 3 numbers a, b, c, and output them in ascending order.

Program Analysis: Use pointer methods.

Example

//  Created by www.tutorialpro.org on 15/11/9.
//  Copyright © 2015年 tutorialpro.org. All rights reserved.
//

# include<stdio.h>

void swap(int *, int *);
int main(void)
{
    int a, b, c;
    int *p1, *p2, *p3;
    printf("Input 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:

Input a, b, c:
1 3 2
1 2 3

C Language Classic 100 Examples

❮ C Function Isalpha C Standard Library String H ❯