Subtract Without Using Subtract Operator

Subtract without subtract operator

   #include<stdio.h>
   int main()
   {
     int a,b;
     int sum;
     printf("Enter any two integers: ");
     scanf("%d%d",&a,&b);
     sum = a + ~b + 1;
     printf("Difference of two integers: %d",sum);
     return 0;
   }