Compilare: user.cpp: In function ‘int main()’: user.cpp:34:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:42:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &mat[k1][i][j]); ^ user.cpp:99:24: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(pred[k][x][y] == 1) ^ user.cpp:99:24: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]