Compilare: user.cpp: In function ‘void citire()’: user.cpp:11:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<n; i++) ^ user.cpp:12:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<n; j++) ^ user.cpp: In function ‘void af(unsigned int (&)[256][256])’: user.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<n;i++){ ^ user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<n;j++) ^ user.cpp: In function ‘int main()’: user.cpp:28:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<n; k++) ^ user.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<n; i++) ^ user.cpp:30:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<n; j++) ^ user.cpp:33:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<n; k++) ^ user.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<n; i++) ^ user.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<n; j++) ^