strcpy函数

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


 5 void myStrcpy(char* Dest, const char *Src)
 6 {
 7     assert((Dest!= NULL)&&(Src!=NULL));
 8     while((*Dest = *Src)!='\0')
 9     {
10         Dest++;
11         Src++;
12     }
13 }
14 
15 int main()
16 {
17     char dest[] = "helloworld";//注意
18     char* src = "hello";
19     myStrcpy(dest, src);
20     printf("%s",dest);
21     return 0;
22 }

1 char *strcpy(char *strDest, const char *strSrc)
2 {
3   assert((strDest != NULL) && (strSrc != NULL)) ;
4   char *address = strDest;
5   while((*strDest++ = *strSrc++) != '\0')   //复制直达源串结束
6      NULL;
7   return address;         
8 }