C program: addition of two numbers without using plus operator

#include<stdio.h>

int main(){

   

    int a,b;

    int sum;

    printf("Enter any two integers: ");

    scanf("%d%d",&a,&b);

    //sum = a - (-b);

    sum = a - ~b -1;

    printf("Sum of two integers: %d",sum);

    return 0;

}

Sample output:

Enter any two integers: 2 15

Sum of two integers: 17