模拟实现strcpy函数

模拟实现strcpy函数

a、代码简练的

#include<stdio.h>
#include<assert.h>

//模拟实现
void my_strcpy(char* dest, const char* src)
{
    assert(dest != NULL);
    assert(src != NULL);
    while (*dest++ = *src++)
    {
        ;
    }
}


//打印数组
void Print(char* arr)
{
    while (*arr != '')
    {
        printf("%c",*arr);
        arr++;
    }
}
int main()
{
    char arr[] = "abcdefg";
    my_strcpy(arr,"hello");
    Print(arr);
    system("pause");
    return 0;
}

b、代码相对容易理解

#include<stdio.h>
#include<assert.h>

void my_strcpy(char* dest, const char* src)
{
    assert(dest != NULL);
    assert(src != NULL);
    while (*src != '')
    {
        *dest = *src;
        dest++;
        src++;
    }
    *dest = *src;
}

void Print(char* arr)
{
    while (*arr != '')
    {
        printf("%c",*arr);
        arr++;
    }
}
int main()
{
    char arr[] = "abcdefg";
    my_strcpy(arr,"hello");
    Print(arr);
    system("pause");
    return 0;
}