poj 1656 Counting Black

//简单的模拟题，按部就班地按照题目的意思做就很容易了，给定一定范围，将这范围内的地方涂黑或者涂白，最后统计黑色方格的个数！
#include <iostream>
#include <string>
using namespace std;

int grid[105][105];

int main()
{
int i, j, tc, x, y, l, boardx, boardy, ans = 0;
string str;
for (i = 1; i <= 100; i++)
for (j = 1; j <= 100; j++)
grid[i][j] = 0;
cin >> tc;
while (tc--)
{
cin >> str >> x >> y >> l;
boardx = x+l-1;
boardy = y+l-1;
if (str == "BLACK")
{
for (i = x; i <= boardx; i++)
for (j = y; j <= boardy; j++)
{
if (grid[i][j] == 0)
grid[i][j] = 1;
}
}
else if (str == "WHITE")
{
for (i = x; i <= boardx; i++)
for (j = y; j <= boardy; j++)
{
if (grid[i][j] == 1)
grid[i][j] = 0;
}
}
else if (str == "TEST")
{
for (i = x; i <= boardx; i++)
for (j = y; j <= boardy; j++)
{
if (grid[i][j] == 1)
ans++;
}
cout << ans << endl;
ans = 0;
}
}

system("pause");
}