Invalid operands to binary (Comparing Double and Int in If statements) C Language

Question

I am trying to make a Time Checker for my "Make a Grocery Store Project". Problem is that when I try to do an error-check for wrong userinput, it doesn't let me compare the two variables. I'm relatively new to coding so if you also have any problem with the way I layout my code and how I could improve, please do so.

// Online C compiler to run C program online
#include <stdio.h>

 int tallytotal;
    int countertimeslots;
      double timeslots = 22.00;
int main() {
  
   
    void TimeSlotsPrinter(double t);
    printf("Please pick the total of items: ");
    scanf("%d", &tallytotal);
    countertimeslots = tallytotal;
        TimeSlotsPrinter(countertimeslots);
}
    
    
    
    
    
    void TimeSlotsPrinter(double t){
        if(countertimeslots >= 260){
            int v = 0;
            for(v; countertimeslots / 260 > v; ++v);
            printf("\nYou have chosen over %d items", countertimeslots);
            printf("\nThis means that you would have to wait %d additional day after tomorrow to pick up your items\n", v);
            countertimeslots -= 260 * v;
        }
            
            countertimeslots /= 20;
         double x = 9;
         x +=countertimeslots;
          printf("The time available is as follows..");
        for(x; timeslots>=x; ++x){
            printf("\n%.2lf", x);
         t--;
        }
        printf("\n**Beware that higher items means longer preparation time**");
        PickTime:
        printf("\nPlease enter your desired timeslot:");
        scanf("%d", &countertimeslots);
        
        if(countertimeslots << t && countertimeslots >> 22){
            printf("\nUnavailable time. Please pick another");
            goto PickTime;
        }
        
        else if(countertimeslots % 12 << 1){
            printf("You have selected %dAM", countertimeslots);
        }
        else
        {
            countertimeslots -= 12.00;
            printf("You have selected %dPM", countertimeslots);
        }}
        

*Error

I expected this to work since when you divide integer 1 in C with any integer greater than that, it would always produce 0.enter image description here

Answer 1

if(countertimeslots << t && countertimeslots >> 22){

<< and >> are bitwise-shift operators. They do not mean very greater and very less.

You may compare the two operands with the < (less than), > (greater than) operators.

if(countertimeslots < t && countertimeslots > 22){