rj.cpp: In function 'int main()': rj.cpp:20: warning: unused variable 'li' rj.cpp:20: warning: unused variable 'cl' rj.cpp:20: warning: unused variable 'nr' rj.cpp:118: warning: unused variable 'ok' rj.cpp:20: warning: 'lr' may be used uninitialized in this function rj.cpp:20: warning: 'lj' may be used uninitialized in this function rj.cpp:20: warning: 'cr' may be used uninitialized in this function rj.cpp:20: warning: 'cj' may be used uninitialized in this function rj.cpp:118: warning: 'lin' may be used uninitialized in this function rj.cpp:118: warning: 'col' may be used uninitialized in this function