Fail compilation

[Domosed-gamin]

Hi! Good implementation of poker. I had error of compilation.

ringo@qwerty:~/Загрузки/oopoker-master$ g++ *.cpp -W -Wall -Wextra -ansi -O3
random.cpp: In function ‘unsigned int getRandomUint()’:
random.cpp:69:5: error: ‘exit’ is not a member of ‘std’
     std::exit(1);
     ^~~

I add #include <cstdlib> in file random.cpp. I'm not programmer and I don't know what I made. But it help me. Please check out this. Maybe somebody have similar error.