[return_val_cases]
# windows powershell: echo $LASTEXITCODE
# nushell: echo $env.LAST_EXIT_CODE
# bash: echo $?
"./01_return.c" = 65536
"./02_decl_expr.c" = 1
"./03_decl_init.c" = 11
"./04_if.c" = 1
"./05_else.c" = 2
"./06_fcall.c" = 3
"./07_while.c" = 10
"./08_do_while.c" = 128
"./09_for.c" = 10
"./10_main.c" = 3
"./11_recursive.c" = 120
"./12_logic.c" = 10
"./13_array.c" = 1198
"./14_pointer.c" = 2
"./15_array_subscript.c" = 1198
"./16_enum.c" = 5
[stdout_val_cases]