I'm sorry, but please take a look at the basic language problem crying

I'm sorry to ask you the most basic question, but the question is Write a program that reads two integers a and b to find the sum and outputs it as follows. Program execution result 1 Input of two integers a and b: 23 2 +3 == 5 Program execution result 2 Input of two integers a and b: 2-3 2 -3 == -1
Here's the question. It's a basic visual studio, but the one I made is

void main() { int a, b, area;

printf ("two integers a, b force:");
scanf_s("%d, %d", &a, &b);
area = a + b;

printf("area=%d \n", area);

}

If you type a and b and press Enter, the window will turn off immediately What's the problem?