Compilare: user.cpp: In function ‘int main()’: user.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i <=n-1 ; i++) ^ user.cpp:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i <=m ; i++) ^ user.cpp:26:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=1; j <= arr[i][3]; j++) ^ user.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=index; i <= m ; i++) ^ user.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=4; j <= 3+arr[i][3]; j++) ^ user.cpp:50:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=4; j <= 3+arr[nr_cam][arr[nr_cam][3]]; j++) ^ user.cpp:50:46: warning: ‘nr_cam’ may be used uninitialized in this function [-Wmaybe-uninitialized]