Write a C program that displays the recommended actions depending on the color of a traffic light using the switch statement.

Q : Write a C program that displays the recommended actions depending on the color of a traffic light using the switch statement.

Solution : 

void main (void)

{

   char colour;

   /* ask user for colour */

   printf ("Enter the colour of the light (R,G,Y,A): ");

   scanf ("%c", &colour);

   /* test the alternatives */      

   switch (colour)

   {

       /* red light */

       case 'R':

       case 'r':

                 printf ("STOP! \n");

                 break;

       /* yellow or amber light */

       case 'Y':

       case 'y':

       case 'A':

       case 'a':

                 printf ("CAUTION! \n");

                 break;

       

       /* green light */

       case 'G':

       case 'g':

                 printf ("GO! \n");

                 break;

       /* other colour */

       default:

                 printf ("The colour is not valid.\n");

   }

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