char variable and if statement error C++

I have the following for loop:

string temp;
int responseInt[10][10] = { {0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0}};

for (int i = 0; i < numberPros; i++)
{
    for (int j = 0; j < numberRes; j++)
    {
        cout << "Is " << process[i] << " holding (h), requesting (r), or doing nothing (n) to " << resources[j] << " ?: ";
        cin >> temp;
        if (temp == 'n')
            responseInt[i][j] = 0;
        else if (temp == 'h')
            responseInt[i][j] == -1;
        else if (temp == 'r')
            responseInt[i][j] == 1;
    }
}

However, it's like if the if statements are ignored, since the default values for responseIntare never changed, even if I type h or r or n.

I already tried with strings, but the same thing happens.

Any help would be appreciated.