Compilare: user.cpp: In function ‘int main()’: user.cpp:31:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:42:70: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&Mat[i][j][k]),d[i][j][k]=Mat[i][j][k]; ^ user.cpp:56:46: warning: ‘posy’ may be used uninitialized in this function [-Wmaybe-uninitialized] Stack[i]=(i-1)*i*(2*i-1)/6+i*(posx-1)+posy; ^ user.cpp:56:43: warning: ‘posx’ may be used uninitialized in this function [-Wmaybe-uninitialized] Stack[i]=(i-1)*i*(2*i-1)/6+i*(posx-1)+posy; ^