Compilare: user.cpp: In function 'int init()': user.cpp:15: warning: format '%d' expects type 'int*', but argument 2 has type 'int' user.cpp:15: warning: format '%d' expects type 'int*', but argument 3 has type 'int' user.cpp: At global scope: user.cpp:26: warning: ISO C++ forbids declaration of 'main' with no type user.cpp: In function 'int init()': user.cpp:24: warning: control reaches end of non-void function user.cpp:15: warning: 'lin' is used uninitialized in this function user.cpp:15: warning: 'col' is used uninitialized in this function