CHeck Password strength

I am currently working on the following task:
A good password must have at least a minimum length of 8 characters and needs to contain at least three digits. write a c program to check whetehr a password is good or not a password returning true or false.

THis is my code.

However, I am still comfused how to make it check existence of 3 digits at least!

PS: I am new to programing in general.

'''#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

int main()
{
    char password[100];
    bool hasupper = false;
    bool haslower= false;
    bool hasdigit= false;
    scanf("%s", password);
    if ( strlen(password)<8){
        printf("Too short");
        }
    for(int i=1; i<strlen(password); i++){
    if (isupper(password[i])){
        hasupper=true;
        }
    if (islower(password[i])){
        haslower=true;
        }
    if (isdigit(password[i])){
        hasdigit=true;
        }
    if(hasdigit && hasdigit && hasdigit && haslower && hasupper){
    printf("true");
    }
    else {
    printf("false!");
    }




    }
    return 0;
}'''