Question

That is my function:

int main() {
    double data[100];

    int num;

    cout<<"num= ";
    cin>>num;

    for(int i = 1; i <= num; i++) {
        cout<<i<<" element = ";
        cin>>data[i];
    }

    Sort(data, num);

    for (int i = 1; i <= num; i++) {
        cout<<data[i]<<endl;
    }

    return 0;
}

void Sort(double data[], int n) {
    int i,j,k;
    double min;

    for(i = 0; i < n-1; i++) {
        k = i;
        min = data[k];

        for(j = i+1; j < n; j++)
            if(data[j] < min) {
                k = j;
                min = data[k];
            }
        data[k] = data[i];
        data[i] = min;
    }
}

if I write for exp. three elements: 8,9,1 again cout 8,9,1?

Answer 1

for(int i = 1; i <= num; i++) { // WRONG

I think you mean:

for(int i = 0; i < num; i++) { // RIGHT

Arrays in C are 0-indexed remember.