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660: Mainline

Later, you use the C compiler again to link the object files into an executable program:

main                    trades.o 
*--------------*        *--------------* 
| Compiled     |        | Compiled     | 
| main         |        | function     | 
| definition   |        | definitions  | 
*--------------*        *--------------* 
    |                          | 
    |  *-----------------------* 
    |  | 
    |  | 
    v  v 
analyze_trades 
*--------------* 
| Executable   | 
| program      | 
*--------------* 

The process of linking object files requires relatively little work, compared to the work required to produce object files from source-code files.