Compilare: user.cpp: In function ‘int main()’: user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp:16: warning: ‘ir’ may be used uninitialized in this function user.cpp:16: warning: ‘ij’ may be used uninitialized in this function user.cpp:16: warning: ‘jj’ may be used uninitialized in this function user.cpp:16: warning: ‘jr’ may be used uninitialized in this function