What is the use of auto key word in storage class

Question

actually auto is one type storage class but we are not using it.if we want to declare a local variable we will give syntax like 'int varname' but no auto then where we are using it???

Answer 1

my answer is;it is used to as type deduction means if we are not using datatype it will decide the data type try this
#include<iostream>
using name space std;
class Test{
Test()
{
var = 12
var 1='a'
cout<<var<<var1;}
int main
{ Test obj;
return 0;}
it will print both values as 12 and 'a'