What's wrong? What do I do? ( I'm new to C++, please forgive me for any mistakes )

Problems and Contests
#1

image
image805Ă—322 9.73 KB 

    #include <iostream>
    #include <vector>

    using namespace std;

    int main() {
        freopen("mixmilk.in", "r", stdin);

        vector<int> bct_cap;
        vector<int> bct_amt;

        int c,a;


        for(int i=0; i < 3; i++){
      
            cin >> c >> a;
            bct_cap.push_back(c);
            bct_amt.push_back(a);
      
        } 

        for (int i = 0; i < 100; ++i)
        {
            int to = (i+1) % 3;
            int from = i % 3;
            int pourAmt = min(bct_amt[from], bct_cap[to] - bct_amt[to]);
            bct_amt[to] += pourAmt;
            bct_amt[from] -= pourAmt;
        }
        

        for (int i = 0; i < bct_amt.size(); ++i)
        {
            cout << bct_amt[i] << "\n";
        }

        freopen("mixmilk.out", "w", stdout);

    }
#2

maybe that’s because of the extra end line
you should do sth like this :

for(int i = 0; i < bct_amt.size(); ++i) 
{
    cout << bct_amt[i];
    if (i < bct_amt.size()-1) cout << "\n";
}
#3

It’s because it is asking you to write your output to the file “mixmilk.out”, not standard.

Your freopen is at the end, rather than at the beginning.

1 Like