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How can I modify the code to input the second columns of the following data file into array x[N]

VELOCITY
3 4 5
4 5 6
...N

x[] = 4, 5 ...N

Code:

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int main(){

        double x[N];

        ifstream in("file.txt");

        int i = 0;
        while (i < N && in >> x[i])
        {
                i++;
        }
}

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Thanks

Read in a line at a time (3 values), throw away (or do something else with) the two values you don't want and store the other (the 2nd column):

Code:

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double temp1, temp2;
while( i < N && in >> temp1 >> x[i] >> temp2 )
{
    ++i;
}

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