不使用strcat将两个字符串连接起来用c语言

以下是用C语言实现不使用strcat函数实现连接两个字符串的方法：

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

#define MAX_LEN 100

void connect(char str1[], char str2[]) {
    int len1 = strlen(str1);
    int len2 = strlen(str2);
    if (len1 + len2 >= MAX_LEN) {
        printf("Error: The length of the connected string exceeds the maximum length!\n");
        return;
    }
    for (int i = 0; i < len2; i++) {
        str1[len1 + i] = str2[i];
    }
    str1[len1 + len2] = '\0';
}

int main() {
    char str1[MAX_LEN], str2[MAX_LEN];
    printf("Please input the first string: ");
    scanf("%s", str1);
    printf("Please input the second string: ");
    scanf("%s", str2);
    connect(str1, str2);
    printf("The connected string is: %s\n", str1);
    return 0;
}