C++ Question

Question

Consider the following code:

#include <iostream>

int main() {
int nums[9];

for( int i = 0; i < 9; i++ ) {
std::cin >> nums[i];
std::cout << nums[i] << '\n';
}

return 0;
}

When I run the code, it first asks to input all the 9 elements and then, it prints the message nine times, each seperated by a new line.
But if we think with respect to the for loop then, the output should be:

1st input, print. 2nd input, print.....
for each element of nums array.

Then, why is it so?

Answer 1

Yes , you are right.

If you run this code in a real ide i.e. in your computer , it will work as you said.

But Sololearn's code playground takes all input at the same time. So, it seams so.

Answer 2

cout doesn't really mean print this variable..
it put the data in a stream buffer and the data will be streamed all together once.
To synchronize the stream buffer you can use std::flush
put this after the cout statement..
std::cout << std::flush;

Answer 3

hit enter to add new input so you can have multiple things happen