Nested switch case in C language

Question

Write a C program that uses a nested switch case to check whether the password entered by the user is valid based on the user's ID.

Solution

The solution is as follows-

• In C language, we can write the internal switch and place it in the external switch .

• The case values ​​of internal and external switches can have the same value.

Rules

• The result is obtained after the expression is executed.
• Case labels must use constants and unique values.
• Case labels must end with a colon (:).
• A break keyword must be included in each case.
• There can only be one default label.
• We can write multiple nested switch statements.

Example

The following C program uses a nested switch case to check whether the password entered by the user is valid based on the user's ID-

Live Demonstration

#include <stdio.h>
int main(){
   int userid;
   int pwd;
   printf("enter userid:");
   scanf("%d",&userid);
   switch (userid){
      case 1234:
         printf("enter password:");
         scanf("%d", & pwd);
      switch (pwd){
         case 0000:
            printf("Tutorials Point");
         break;
            default:
         printf("incorrect password");
            break;
      }
      break;
         default:
      printf("incorrect userid");
         break;
   }
}

Output

You will see the following output -

Run 1:enter userid:
1234
enter password:
0000
Tutorials Point
Run 2:
enter userid:
1234
enter password:
234
incorrect password

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