C语言2、 已知字符串1为："fine!", 字符串2为："How are you?"，试将这两个字符串连接成一个字符串，要求长的字符串放到前面。试编程输出这个字符串和这三个字符串的长度。

下面是一个示例代码：

#include <stdio.h>
#include <string.h>

int main() {
    char str1[] = "fine!";
    char str2[] = "How are you?";
    char result[100];

    if (strlen(str1) >= strlen(str2)) {
        strcpy(result, str1);
        strcat(result, str2);
    } else {
        strcpy(result, str2);
        strcat(result, str1);
    }

    printf("Result: %s\n", result);
    printf("Length of result: %d\n", strlen(result));
    printf("Length of str1: %d\n", strlen(str1));
    printf("Length of str2: %d\n", strlen(str2));

    return 0;
}

输出结果为：

Result: How are you?fine!
Length of result: 17
Length of str1: 5
Length of str2: 12