$1\mathrm{.}7$ LAB: Introduction to data structures labs

Step $1$: Producing correct output

Three commented$-$out lines of code exist in the main part of the program. Uncomment the lines and click the "Run program" button. Verify that the program's output is:

$2+2=4$

Unknown method: print$\_$plus$\_2$

Secret string: "abc"