#include <stdio.h>  // standard input output library
#include <string.h> // basic string handling library added for cAgain option
 
//Assigns tax value for calculations
#define DelMar 7.25
#define Encinitas 7.5
#define LaJolla 7.75
 
char cAgain;  //repeat variable for Y/N questions
 
int displayMenu()  // creates menu
{
    int choice;
    printf("Tax Calculation for $125 Purchase\n\n");
    printf("1. Del Mar \n");
    printf("2. Encinitas \n");
    printf("3. La Jolla \n");
    printf("\n\nPlease Select Store for Which to Calculate [1-3]:");
 
    scanf("%d",&choice);
    return choice;
}
 
int main()
{
YES:
{				
// Sales value for calculations
    float sales = 125.00;
    int storenum;
 
 
    storenum = displayMenu();
    if storenum >=1 || if storenum <=3     //While Loop to Request Input of 1,2,or 3, still working on this
    {
 
  	switch (storenum) // simple switch which responds to corresponding menu choice with output
    {
    case 1:
//Calculates and Displays Store, Sales, Tax rate, Tax for Del Mar
        printf("\nDel Mar \tSale $%.2f\tRate %.2f%%\tTax $%.2f%\t\n\n",sales, DelMar, sales*DelMar/100); //values are correct so I am leaving it this way. ahead of schedule here.
        break;
    case 2:
//Calculates and Displays Store, Sales, Tax rate, and Tax for Encinitas
        printf("\nEncinitas \tSale $%.2f\tRate %.2f%%\tTax $%.2f%\t\n\n",sales, Encinitas, sales*Encinitas/100);
        break;
    case 3:
//Calculates and Displays Store, Sales, Tax rate, and Tax for La Jolla
        printf("\nLa Jolla \tSale $%.2f\tTax %.2f%%\tTax $%.2f%\t\n\n",sales, LaJolla, sales*LaJolla/100);
        break;
    } //Storenum switch end
    }
    else
    {
    fflush(stdin);
    	printf("\nPlease enter 1,2 or 3\n");
 
    	printf("\n\tINVALID NUMBER ENTERED! Would you like to try again? (y/n) ");//allows repeat 
            scanf("%c", &cAgain);  //scan input to repeat program
 
               if (cAgain == 'y' || cAgain == 'Y')//repeats calculator
               {
               goto YES;  //back to menu
               }
               else if (cAgain == 'n' || cAgain == 'N')//sends to end
 
   return 0;  
    } 
 
 
    printf("\n\tWould you like to calculate for another store? (y/n) ");//prompts for repeat
            scanf("%c", &cAgain);   
 
               if (cAgain == 'y'|| cAgain == 'Y')//repeats calculator upper or lower case
               {
               goto YES;  //sends user back to the begining
               }
                  else if (cAgain == 'n' || cAgain == 'N')//ends program upper or lower case
                  {
                  printf("\n\tPlease press enter to exit\t\n");  //prompts for exit
                  }
 
  return 0;
}
}

if (storenum >= 1 && storenum <= 3) {
    /* do something */
}

if storenum >=1 || if storenum <=3 //While Loop to Request Input of 1,2,or 3, still working on this

while(/*condition here*/) {
/* Code here */
}

  if (storenum >=1 && if storenum <=3)     //While Loop to Request Input of 1,2,or 3, still working on this
    {
 
  	switch (storenum) // simple switch which responds to corresponding menu choice with output
  }
    {
    case 1:
//Calculates and Displays Store, Sales, Tax rate, Tax for Del Mar
        printf("\nDel Mar \tSale $%.2f\tRate %.2f%%\tTax $%.2f%\t\n\n",sales, DelMar, sales*DelMar/100); //values are correct so I am leaving it this way. ahead of schedule here.
        break;
    case 2:
//Calculates and Displays Store, Sales, Tax rate, and Tax for Encinitas
        printf("\nEncinitas \tSale $%.2f\tRate %.2f%%\tTax $%.2f%\t\n\n",sales, Encinitas, sales*Encinitas/100);
        break;
    case 3:
//Calculates and Displays Store, Sales, Tax rate, and Tax for La Jolla
        printf("\nLa Jolla \tSale $%.2f\tTax %.2f%%\tTax $%.2f%\t\n\n",sales, LaJolla, sales*LaJolla/100);
        break;
    } //Storenum switch end
    }
    else
    {
    fflush(stdin);
    	printf("\nPlease enter 1,2 or 3\n");
 
    	printf("\n\tINVALID NUMBER ENTERED! Would you like to try again? (y/n) ");//allows repeat 
            scanf("%c", &cAgain);  //scan input to repeat program
 
               if (cAgain == 'y' || cAgain == 'Y')//repeats calculator
               {
               goto YES;  //back to menu
               }
               else if (cAgain == 'n' || cAgain == 'N')//sends to end
 
   return 0;  
    }