C pointer to implement string Inversion

C pointer to implement string Inversion

Question requirements:

 

Program writing: input a string from the keyboard at will and output the string.
Then, store the string in reverse order and then output it. It must be completed with a character pointer.

Code:

 

 

// Solution 1 # include

 
  
# Include

  
   
Int main () {char a [20] = {0}, B [20] = {0}, * p1, * p2; printf ("any input string: "); // memset (B, 0X00, sizeof (B); gets (a); p1 = a; p2 = B + strlen (a)-1; for (; * p1! = '\ 0'; p1 ++, p2 --) * p2 = * p1; * p2 =' \ 0'; printf ("string a is: % s \ n ", a); printf ("string B is: % s \ n", B); return 0 ;}// solution 2 # include

   
    
# Include

    
     
# Define MAXN 1000 void reverse (char * str) {char * p = str + strlen (str)-1; char temp; while (str