From the C/C++ editor

You can control your debug session using the C/C++ editor by having the program run until it hits the line your cursor is sitting on. If the program never hits that line, the program runs until it finishes or hits another breakpoint.

You can also use the C/C++ editor's context menu to resume execution at a specific line, or to add a watch expression.

To use the C/C++ editor to debug a program:

In the editor, select a file associated with the process being debugged.
Left-click to insert the cursor where you want to interrupt the execution.
Right-click near the cursor and select Run To Line, Resume at line or Add watch expression.

Note: Note that Run To Line works only in the current stack frame. That is, you can use Run to Line only within the currently executing function.