Add Palindromic Number in C++ (TheRenegadeCoder#2522)

Shandin17 · Nov 1, 2021 · bdd422c · bdd422c
1 parent 170929a
commit bdd422c
Showing 1 changed file with 57 additions and 0 deletions.
diff --git a/archive/c/c-plus-plus/palindromic-number.cpp b/archive/c/c-plus-plus/palindromic-number.cpp
@@ -0,0 +1,57 @@
+/*
+ accept an integer, reverse it, compare it with original
+ print true, if original and reversed number are same
+ print false, if original and reversed number are same
+*/
+#include <iostream>
+#include <string.h>
+#include <stdlib.h>
+
+using namespace std;
+
+void palindromic_number(int number){
+  int temp = number, no_of_digits = 0,reversed_number = 0;
+
+  while (temp > 0){
+    reversed_number = (reversed_number * 10) + (temp % 10);
+    temp = (int)(temp / 10);
+    no_of_digits ++;
+  } /*end of building reverse number*/
+
+  if (no_of_digits < 2){
+     cout <<"Usage: please input a number with at least two digits";
+    exit(1);  
+  }
+  else{
+    if (reversed_number == number){
+       cout <<"true";
+    }
+    else{
+       cout <<"false";
+    }
+  } /*end of more than 2 digit number check*/
+ /*end of palindromic_number function*/
+}
+
+/*Return 1 if number, else return 0*/
+int is_int(char *number_string){
+  if(number_string[0] > '9' || number_string[0] < '0')
+    return(0);
+  for (int counter = 0; number_string[counter]; counter++){
+    if(number_string[0] > '9' || number_string[0] < '0')
+      return(0);
+  }
+  return(1);    
+
+}
+
+/* accept only integers with minimum 2 digits */
+int main(int argc, char **argv){
+  /*Read command line arg*/
+  if (argc != 2 || is_int(argv[1]) != 1){
+     cout <<"Usage: please input a number with at least two digits";    
+    return(1);  
+  }
+   palindromic_number(atoi(argv[1]));
+   return(0);
+}