Question

In c++ will their be any error if we input an integer containing leading zereos.

for eg:

 int a;
 cin>>a;

we give an input 00 or 01.

or inputing with the help of string for this is a better idea.

Answer 1

Integers (or floats for that matter) do not have leading zeroes. If you want to keep the leading zeroes then you have to read the input as a string instead, and convert it to number when needed. Or you can use formatting to add leading zeroes when printing results.