How to know whether it is profit or loss or nothing

CODE

How to know whether it is profit or loss or nothing

Program to check profit, loss or nothing, and what is the amount

int main()

{

    int sp,pp,a;

    printf("\n enter the purchase price and selling price:");

    scanf("%d%d",&pp,&sp);

    a=sp-pp;

    if (a<0)

        printf("\n loss=%d",a*(-1));

    else if(a>0)

        printf("\n profit=%d",a);

    else

        printf("\n neither profit nor loss");

}

Output:

enter the purchase price and selling price:

45

87

 profit=42