C Program (Premature scanf)(Line 54 & 55 for explain)

#include <stdio.h>
#include <stdlib.h>



/******************************************************************************

C program

*******************************************************************************/




int main()
{
    setvbuf(stdout, 0, _IONBF, 0);
    setvbuf(stdin,  0, _IONBF, 0);

    int x = 0;
    int y = 0;
    int z = 0;
    int cont = 1;
    int option = 0;

    printf("Please enter a number: ");
    scanf("%d", &x);

    printf("Please enter a number: ");
    scanf("%d", &y);



    while (1){

        printf("Would you like to \n");
        printf("1) Take the sum? \n");
        printf("2) Take the product? \n");
        printf("3) Take the difference? \n");
        printf("4) Take the quotient? \n");
        printf("5) Get the remainder? \n");
        printf("6) Compare both integers? \n");
        printf("7) Compare Three integers? \n");
        printf("8) Even or odd? \n");
        printf("9) Is the first the multiple of the second? \n");
        printf("0) Exit \n");

        printf("Please enter an option: ");
        scanf("%d \n", &option);

        //The is a bug on the terminal after you enter the the scanf for option variable. The terminal asks for input, that then
        //enters the next input into the cont variable. Which it should not be calling and effects the code later
        //The scanf also requests later when called apon by the scanf for cont


        //Sum
        if(option == 1){
            int full = x + y;
            printf("The sum of %d and %d is %d \n", x,y,full);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Product
        if(option == 2){
            int full = x * y;
            printf("The product of %d and %d is %d \n", x,y,full);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Difference
        if(option == 3){
            int full = x - y;
            printf("The sum of %d and %d is %d \n", x,y,full);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Quotient
        if(option == 4){
            int full = x/y;
            printf("The quotient of %d/%d is %d \n", x,y,full);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Remainder
        if(option == 5){
            float full = x % y;
            printf("The remainder of %d and %d is %f \n", x,y,full);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Compare two integers
        if(option == 6){
            if (x > y)
                printf("First number is %d which is greater than the second number which is %d \n",x,y);
            else if (x < y)
                printf("Second number is %d which is greater than the first number which is %d \n",y,x);
            else
                printf("Both numbers are equal to %d \n", x);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Compare three integers
        if(option == 7){
            printf("Enter a third number to compare with %d and %d :",x,y);
            scanf("%d \n", &z);
            int max = x;
            int min = x;

            //Max
            if (x > max){
                max = x;
            }

            if (y > max){
                max = y;
            }

            if (z > max){
                max = z;
            }

            //Min

            if (x < min){
                min = x;
            }

            if (y < min){
                min = y;
            }

            if(z < min){
                min = z;
            }

            printf("The max is %d \n",max);
            printf("The min is %d \n",min);

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //Even or Odd
        if(option == 8){
            if (x % 2 == 0){
                printf("%d is Even\n", x);
            }
            else{
                printf("%d is Odd\n", x);
            }
            if (y % 2 == 0){
                printf("%d is Even\n", y);
            }
            else{
                printf("%d is Odd\n", y);
            }

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 1){

            }
            else if (cont == 0){
                break;
            }
        }

        //First a multiple of the second
        if(option == 9){
            if (x % y == 0){
                printf("%d is a multiple of %d\n", y, x);
            }
            else{
                printf("%d is not a multiple of %d\n", y, x);
            }

            printf("Press enter 1 to continue or enter 0 to exit: ");
            scanf("%d \n", &cont);
            if (cont == 0){
                return 0;
            }
        }

        //Exit
        if(option == 0 || cont == 0){
            break;
        }


    }

    return 0;
}