simple calculator menu based

#include<stdio.h>
#include<math.h>
//a simple calculator menu based
int main()
{
   double num1,num2;
    int op;
    printf(" Menu\n");
    printf("1.addition.\n2.subtraction.\n3.multiplication.\n4.division.\n");
    printf("Please input your choice \n");
    scanf("%d",&op);
    printf("Enter two numbers: \n");
    scanf("%lf %lf",&num1,&num2);
    switch(op)
{

case 1:{
    printf("%.1lf + %.1lf=%.1lf",num1,num2,num1+num2);
    break ;
}
    case 2:{
    printf("%.1lf - %.1lf=%.1lf",num1,num2,num1-num2);
    break ;}

    case 3:{
    printf("%.1lf X %.1lf=%.1lf",num1,num2,num1*num2);
    break ;}

    case 4:{
    printf("%.1lf/%.1lf=%.1lf",num1,num2,num1/num2);
    break ;}




default: printf("input correct option");
}

    return 0;
}