C Exercise Example 79
Title:String sorting.
Program analysis:None.
Program source code:
Example
// Created by www.example.com on 15/11/9.
// Copyright © 2015 Example. All rights reserved.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_LEN 20 // Define a constant representing the maximum length of the string
// Function declaration: used to swap two strings
void swap(char *str1, char *str2);
int main() {
char str1[MAX_LEN], str2[MAX_LEN], str3[MAX_LEN];
// Prompt the user to enter strings
printf("Please enter 3 strings, each ending with a newline:\n");
// Use fgets to read input and remove the newline character
fgets(str1, sizeof(str1), stdin);
str1[strcspn(str1, "\n")] = '\0'; // Remove the newline character
fgets(str2, sizeof(str2), stdin);
str2[strcspn(str2, "\n")] = '\0'; // Remove the newline character
fgets(str3, sizeof(str3), stdin);
str3[strcspn(str3, "\n")] = '\0'; // Remove the newline character
// Sort the strings
if (strcmp(str1, str2) > 0) swap(str1, str2);
if (strcmp(str2, str3) > 0) swap(str2, str3);
if (strcmp(str1, str2) > 0) swap(str1, str2);
// Output the sorted result
printf("The sorted result is:\n");
printf("%s\n%s\n%s\n", str1, str2, str3);
return 0;
}
// Swap the contents of two strings
void swap(char *str1, char *str2) {
char temp[MAX_LEN];
strcpy(temp, str1); // Copy str1 to the temporary string temp
strcpy(str1, str2); // Copy str2 to str1
strcpy(str2, temp); // Copy temp to str2
}
The output of running the above example is:
请输入3个字符串,每个字符串以回车结束!: b a t 排序后的结果为： a b tother extensions