int main()
{
    vector<int> g1;
  
    for (int i = 1; i <= 10; i  )
    {
     g1.push_back(i * 10);
     cout << g1[i] << " ";
    }
    
}

The above written code is giving me output as "0 0 0 0 0 0 0 0 0 0" that 10 0's with a space after each 0 of them, as written in the code. But in the code, it is written to add at the end of the vector the iterator*10:

g1.push_back(i * 10);

and the output code

cout << g1[i] << " ";

is giving 0 for every iterations(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) when it should be giving:

10 20 30 40 50 60 70 80 90 100

as the output

Output:

0 0 0 0 0 0 0 0 0 0

Expected output:

10 20 30 40 50 60 70 80 90 100

CodePudding user response：

 cout << g1[i] << " ";

should be

 cout << g1[i - 1] << " ";

In C arrays and vectors use zero based indexing.

CodePudding user response：

As cigien and G.M. explained in the comments to the question above, over here in the code, the iteration should start at 0 since in the vector the indices start at 0 or else the g1.push_back(i * 10); part of the code can give anything because that's undefined behavior as pointed out by πάντα-ῥεῖ in the comments of this answer.

So either for (int i = 1; i <= 10; i ) needs to be modified to be for (int i = 0; i < 10; i ) or as noted by ceorron in their answer we can have cout << g1[i] << " "; modified to be cout << g1[i - 1] << " "; to make the code give expected output after compilation and execution.