foo.cpp:62:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
foo.cpp: In function 'int main()':
foo.cpp:64:23: error: 'memset' was not declared in this scope
foo.cpp: In function 'bool check2(int, int)':
foo.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type]
foo.cpp: In function 'bool check(int, int)':
foo.cpp:12:1: warning: control reaches end of non-void function [-Wreturn-type]