Setting your PIN -exercise

Question

This is my code, in input 4 I should get “4324”.
And I have 3120.
Run out of ideas. Maybe someone can help ?

#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
srand(0);
int range;
cin >> range;
range+=1;
for (int i=0;i<4;i++)
cout <<rand()%range;

return 0;
}

Answer 1

It appears the actual range is (0, N], i.e. the 0 is exclusive (in case this notation is unfamiliar, parentheses mean the boundary element is not in the range, while a square bracket means it is in the range). That's at least what I figured from the test cases and how I solved the challenge.
Therefore, the problem is that you add 1 to the range beforehand, which means you can generate numbers in the range [0, N]. However, if you add 1 after generating the number, the interval equals 1 + [0, N) = 1 + [0, N - 1] = [1, N] = (0, N].
So basically, try adding 1 to the generated number instead of adding 1 to the range.

Answer 2

#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
srand(0);
int range;
cin >> range;
//your code goes here
for (int i = 0; i < 4; i++){
cout<<rand()%range+1;
}

return 0;
}

Good Luck

Answer 3

yes yes, result shude be predictable.
and shud be 4324.
i dont want to have unpredicable.
so is 2 option i may did somthing wrong or answer in the solarapp is wrong.

Answer 4

You must set a PIN for your suitcase that contains 4 digits in the range of 0 to N.
Write a program to take the N number as input, generate 4 random numbers from the range and print them sequentially, without spaces.

Sample Input
4

Sample Output
4324

//Use rand() function to generate the numbers from required range.
srand(0) is used to match the output, so don't change it.//

Answer 5

Shadw YOU are BEST! Thanks !

Answer 6

int main(){
srand(0);
int range;
cin >> range;
for (int i = 0; i < 4; i++){
cout<<rand()%range+1;
}
return 0;
}

Answer 7

Add this for loop to your code

for (int i = 0; i < 4; i++){
cout<<rand()%range+1;
}

Answer 8

I read the problem and tried to solve it from scratch in VSC so I coded this one, I ran it and everything was OK, My confusion came when I pasted my code in the exercise page and it showed an error, my error was not adding +1 in the for loop 8th line but I don't understand, why do I need to add that +1?, could anyone explain that please?

#include <iostream>
#include <cstdlib>

void PIN(int n){
int pin;
srand(0);
for(int i = 0; i < 4; i++){
pin = 1+ rand() % n;
std::cout<<pin;
}

}

int main(){
int n;
std::cin>>n;
PIN(n);
return 0;
}

Answer 9

Working C++ code;

#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
srand(0);
int range;
cin >> range;
//your code goes here
int PIN[4];
for(int i=0; i<4; i++)
PIN[i]=1+(rand()%range);
cout<<PIN[0]<<PIN[1]<<PIN[2]<<PIN[3]<<endl;
return 0;
}