面试记录06：输入字符串，采用指针，逆序输出。

Posted 2020-12-14 cogito

 1 #include <stdio.h>
 2 #include <string.h>
 3 
 4 char *strconv(char *p)
 5 {
 6     int length = strlen(p) ;
 7     char *ptr = p ;
 8     char *ptr_1 = p+length - 1;
 9     while(ptr < ptr_1)
10     {
11         char c = *ptr ;
12         *ptr = *ptr_1 ;
13         *ptr_1 = c ;
14         ++ptr ;
15         --ptr_1 ;
16     }
17     return p ;
18 }
19 
20 int main(void)
21 {
22     char str[]="abcdef1234" ;
23     char *p;
24     p = strconv(str);
25     printf("%s",p);
26     return 1;
27 }