unary operators

#include<stdio.h>
#include<math.h>
// All   unary operators
int main()
{
    /* The minus operator changes the sign of its argument.
    A positive number becomes negative,
     and a negative number becomes positive. */
    int a,b,result;
    printf(" Enter value of a: \n");
    scanf("%d",&a);
    result= -a;
    printf("a: %d\n",result);

    printf(" value of b: \n");
    scanf("%d",&b);
    result = +b;//useless huh
    printf("b : %d",result);
     return 0;
     }