AcmStep Chapter One Section Two—Nasty Hacks

Problem Description

You are the CEO of Nasty Hacks Inc., a company that creates small pieces of malicious software which teenagers may use

to fool their friends. The company has just finished their first product and it is time to sell it. You want to make as much money as possible and consider advertising in order to increase sales. You get an analyst to predict the expected revenue, both with
and without advertising. You now want to make a decision as to whether you should advertise or not, given the expected revenues.

Input

The input consists of n cases, and the first line consists of one positive integer giving n. The next n lines each contain 3 integers, r, e and c. The first, r, is the expected revenue if you do not advertise, the second, e, is the expected revenue
if you do advertise, and the third, c, is the cost of advertising. You can assume that the input will follow these restrictions: -106 ≤ r, e ≤ 106 and 0 ≤ c ≤ 106.

Output

Output one line for each test case: “advertise”, “do not advertise” or “does not matter”, presenting whether it is most profitable to advertise or not, or whether it does not make any difference.

#include <iostream>
using namespace std;
int main()
{
int n;
cin>>n;
while (n--)
{
int a,b,c,d;
cin>>a>>b>>c;
d=b-c;
if (d<a)
cout<<"do not advertise"<<endl;
else
if (d==a)
cout<<"does not matter"<<endl;
else
cout<<"advertise"<<endl;
}
return 0;
}

这或者只是一个幼稚的起步，但希望路过的大牛可以指点一二，从各方面都可以，包括编程风格等。