首先,我们来看一下MSDN中对strcpy的定义,函数参数,返回值
strcpy
(定义)Copy a string.
(函数的返回类型及参数)char *strcpy( char *strDestination, const char *strSource );
(返回值)Each of these functions returns the destination string. No return value is reserved to indicate an error
接下来看一些代码实现
#include<stdio.h>
#include<assert.h>
#include<windows.h>
char * my_strcpy(char* dest, const char* cpy)
{char
assert(dest != NULL);
assert(cpy != NULL);
char* str = dest;
while (*dest++ = *cpy++)//先赋值,再判断,此时把'\0'已经拷入,然后判断为0,跳出循环
{
;
}
return str;
}
int main()
{
char* arr = "abcdefqwer";
char arr1[] = {0};
char* str1 = my_strcpy(arr1, arr);
printf("%s",str1);
system("pause");
return 0;
}