Automatic storage class

Automatic Storage Class:

·       It stores variable in memory

·       Initial value of automatic class variables is garbage values.

·       Variable scope is local to block in which it is defined.

·       Life of variable will be only till control remains in block.

·       Keyword - auto

Example: 

                 This example shows how to define a auto variable.

#include<stdio.h>      main( )      {           auto int i, j ;           printf ( "\n%d %d\n", i, j ) ; }

In this example, we did not initialize I and j variable, so it displays garbage values after execution.

   Example 2 : this example will illustrate scope of auto variable.

#include<stdio.h> main( ) {           auto int test=100;           {                     auto int test=200;                     {                               auto int test=300;                              printf("%d   ",test);                      }                   printf("%d   ",test);              }           printf("%d",test);  }