Beginner problem: scanf & prinf

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C

#include <stdio.h>

int main()
{
int num1;
int num2;
int num3;

scanf("%d", num1);
scanf("%d", num2);

num3 = num1 + num2;

printf("The number added is: %d", num3);
}

What is wrong with this. I'm trying to take 2 numbers and adding them and printing out the addition of them

What I have tried:

I looked up what %d meant but I couldn't find the issue. Maybe the number inputed is a string? But I did use %d.

i declared all three variables as an a number (integer).