Simple Calculator

int main()
{

    int input,a,b,result;
    char x;

do{

    printf("Calculator:\n");

    printf("\nEnter 1 for Addition:\n ");
    printf("Enter 2 for Subtraction:\n ");
    printf("Enter 3 for Multiplication:\n ");
    printf("Enter 4 for Division:\n ");

    scanf("%d",&input);
    printf("Enter number 01:\n");
    scanf("%d",&a);
    printf("Enter number 02:\n");
    scanf("%d",&b);

    switch(x){
        case 1 : result=a+b;
                 printf("The addition is : %d\n",result);
                 break;
        case 2 : result=a-b;
                 printf("The Substraction is : %d\n",result);
                 break;
        case 3 : result=a*b;
                 printf("The Multiplication is : %d\n",result);
                 break;
        case 4 : result=a/b;
                 printf("The division is : %d\n",result);
                 break;

        default: printf("wrong input\n");

    }
    printf("Do you want to continue ? (y/n)\n");
    option=getche();

    }while(option=='y');

 return 0;
}