c Language practice 29-- input does not exceed a five-digit number, a total of digits is determined and output in reverse order

#include <stdio.h> 
#include <stdlib.h>
 / * Title: Given a positive integer not exceeding 5, and requirements: First, it is seeking few, two, reverse printing out of the digits. * / 
Int main () {
 int A, A1, A2, A3, A4, A5;
 the while ( . 1 ) { 
the printf ( " Enter a number from 5 within: " ); 
Scanf ( " % D " , & A );
 IF (A <= . 9 ) 
the printf ( " total number of bits, reverse:% D \ n- " , A);
 the else  IF (A <= 99 ) { 
A1 = A% 10 ; 
A2 = A / 10 ;
the printf ( " of 2 bits, reverse:% D% D \ n- " , A1, A2);}
 the else  IF (A <= 999 ) { 
A1 = A% 10 ; 
A2 = A / 10 % 10 ; 
A3 = A / 100 ; 
the printf ( " total of 3 digits, reverse: D%%% D D \ n- " , A1, A2, A3);}
 the else  IF (A <= 9999 ) { 
A1 = A% 10 ; 
A2 = A / 10 % 10 ; 
A3 = A / 100 % 10 ; 
A4 = A /1000 ; 
the printf ( " 4-digit, reverse: D%%% D D D% \ n- " , A1, A2, A3, A4);}
 the else  IF (A <= 99999 ) { 
A1 = A% 10 ; 
A2 A = / 10 % 10 ; 
A3 = A / 100 % 10 ; 
A4 = A / 1000 % 10 ; 
A5 = A / 10000 ; 
the printf ( " total of five digits, reverse:% d% d% d% d% d \ n- " , A1, A2, A3, A4, A5);}
 the else  
the printf ( " input error, please re-enter \ n- " ); 
}
 return 0;
}
   

 Method Two

#include <stdio.h> 
#include <stdlib.h> int main () {
 int I, L;
 char A [ . 5 ];
 the while ( . 1 ) { 
the printf ( " Enter a number: " );
 for (I = 0 ; I < 100 ; I ++ ) { 
Scanf ( " % C " , & A [I]);
 IF (A [I] == ' \ n- ' )
 BREAK ;} 
L = I; 
the printf ( " total% d bits, reverse output is: " , L);
 for

(i=l-1;i>=0;i--)       //a[l]
printf("%c",a[i]);
printf("\n________________________________\n");
}
return 0;
}