Thread: do while loop to continue program

The assignment is: Add a do-while loop so that the program will continue prompting the user to see if another calculation is to be done.
I can't seem to figure out how to do the do-while loop. (where to put it) What I have gives runs but not 100% correct, so I'm assuming it is a minor detail. Please help.
Thanks

Code:

#include <stdio.h>

int main()
{
	// Variable Declarations
	float num1, num2, result;
	char sel, sel2, Y;
	
	do
	{	
	// Input: Getting 2 numbers
	printf("Enter 2 numbers: ");
	scanf("%f %f",&num1, &num2);
	
	//Displaying the menu
	printf("\nMenu:\n");
	printf("A ----- Addition\n");
	printf("S ----- Subtraction\n");
	printf("M ----- Multiplication\n");
	printf("D ----- Division\n");
	
	// Input: Getting the user's selection
	printf("\nEnter the letter corresponding to the calculation to be performed: ");
	scanf(" %c",&sel);


	
		if(sel=='A' || sel=='a')
		{
			result = num1+num2;
			printf("\nThe addition is: %.2f\n",result);
		}
		else if(sel=='S' || sel=='s')
		{
			result = num1-num2;
			printf("\nThe subtraction is: %.2f\n",result);
		}
		else if(sel=='M' || sel=='m')
		{
			result = num1*num2;
			printf("\nThe multiplication is: %.2f\n",result);
		}
		else if(sel=='D' || sel=='d')
		{
			result = num1/num2;
			printf("\nThe division is: %.2f\n",result);
		}
		else
		{
			printf("\nInvalid Choice\n");
		}
		
		printf("Would you like to perform another calculation?");
		scanf(" %c", &sel2);
	}while(sel2=Y);
	
	
	return 0;
}

I forgot to mention that this must be in C.

When you have a scanf() for a number, and then you have a scanf() for a char, you need to get rid of the newline char, in the keyboard buffer, before the scanf() for the char.

So:

scanf() //for the float or int

getchar() //removes the newline char

scanf() for the char

Otherwise the scanf() for the char will be "skipped" (looks like it anyway), frequently.

Welcome to the C forum! Not to worry, C is all we do here!

Thanks for the quick reply, however I have not learned the getchar() function in my class, therefore I can not use it. Is there another way?

Ok I figured it out. I just changed }while(sel2=Y); to }while(sel2=='Y');

Thanks guys, I'll be back again.