Please HELP me.. (c++)

#include <iostream>
using namespace std;
                                                                                                                                                                
int compare(int num,int minimum, int maximum, int increment){
    int count=0;
    for(int i=minimum; i<=maximum; i+=increment){
        if(num > i && num <= maximum){
            count++;
        }
    }
    return count;
}
                                                                                                                                                                
                                                                                                                                                                
int main(){
                                                                                                                                                                
    int code=0;
    cout << "\nPlease enter a number and a range maximum: ";
    cin >> code;
                                                                                                                                                                
    switch(compare(code,0,10,3)){
        case 1: cout << "\nOne\n"; break;
        case 2: cout << "\nTwo\n"; break;
        case 3: cout << "\nThree\n"; break;
        default: cout << "\nNot found\n"; break;
    }
                                                                                                                                                                
    return 1;
}