复制字符串函数可写为
char *cpystr(char *from,char *to)
{
char *addr=to;
while (*to++=*from++);
return addr;
}
测试代码为：
1
#include
<
stdio.h
>
2 #include < string .h >
3 char * cpystr( char * from, char * to);
4
5 int main()
6 {
7 char stra[] = " abc " ;
8 char strtemp[ 3 ];
9 char * ptemp;
10 ptemp = pystr(stra,strtemp);
11 printf( " %s\n " ,ptemp);
12 printf( " %s\n " ,strtemp);
13 return 1 ;
14 }
15
16 char * cpystr( char * from, char * to)
17 {
18 char * addr = to;
19 while ( * to ++=* from ++ );
20 return addr;
21 }
2 #include < string .h >
3 char * cpystr( char * from, char * to);
4
5 int main()
6 {
7 char stra[] = " abc " ;
8 char strtemp[ 3 ];
9 char * ptemp;
10 ptemp = pystr(stra,strtemp);
11 printf( " %s\n " ,ptemp);
12 printf( " %s\n " ,strtemp);
13 return 1 ;
14 }
15
16 char * cpystr( char * from, char * to)
17 {
18 char * addr = to;
19 while ( * to ++=* from ++ );
20 return addr;
21 }
