Compilare: user.cpp: In member function ‘void matrice::inm(const matrice&)’: user.cpp:22:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vec.size();++i) ^ user.cpp:23:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<othvec[0].size();++j) ^ user.cpp:24:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<vec[0].size();++k) ^ user.cpp: In member function ‘void matrice::afis()’: user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vec.size();++i) ^ user.cpp: In function ‘void rid(matrice&)’: user.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sult.size();++i) ^ user.cpp:42:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sult.size();++i) ^ user.cpp:43:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sult[i].size();++j) ^ user.cpp: In function ‘int solve()’: user.cpp:56:9: warning: unused variable ‘a1’ [-Wunused-variable] int a1=0,b1=0; ^ user.cpp:56:14: warning: unused variable ‘b1’ [-Wunused-variable] int a1=0,b1=0; ^