Compilare: user.cpp: In function ‘int main()’: user.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < sir.length(); ++j) ~~^~~~~~~~~~~~~~ user.cpp:115:45: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << tmin << " " << x << " " << y << "\n"; ^~~~ user.cpp:115:33: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << tmin << " " << x << " " << y << "\n"; ^~~ user.cpp:66:18: warning: ‘jR’ may be used uninitialized in this function [-Wmaybe-uninitialized] leeR[iR][jR] = leeJ[iJ][jJ] = 1; ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ user.cpp:66:18: warning: ‘iR’ may be used uninitialized in this function [-Wmaybe-uninitialized]