nested switch

It is possible to have a switch as a part of the statement sequence of an outer switch. Even if the case constants of the inner and outer switch contain common values, no conflicts will arise.

switch(ch1) {

   case 'A': 

      printf("This A is part of outer switch" );

      switch(ch2) {

         case 'A':

            printf("This A is part of inner switch" );

            break;

         case 'B': /* case code */

      }

  

      break;

   case 'B': /* case code */

}

Example:

#include <stdio.h>

int main () {

   /* local variable definition */

   int a = 100;

   int b = 200;

   switch(a) {

   

      case 100: 

         printf("This is part of outer switch\n", a );

      

         switch(b) {

            case 200:

               printf("This is part of inner switch\n", a );

         }

   }

   

   printf("Exact value of a is : %d\n", a );

   printf("Exact value of b is : %d\n", b );

   return 0;

}

output:

This is part of outer switch

This is part of inner switch

Exact value of a is : 100

Exact value of b is : 200