numbers triangle

[cheryl tan]

Write a C program to print the following number structure:

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5



can anyone please solve this?what I got is like:
1
12
123
1234
12345

thanks.

[mjyz]

cout << "1" << " " << "2" << endl;
you should include a space between numbers