Compilare: user.cpp: In function ‘int main()’: user.cpp:31:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &N); ^ user.cpp:36:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &mat[i][j]); ^ user.cpp:44:14: warning: ‘pY’ may be used uninitialized in this function [-Wmaybe-uninitialized] f(pX, pY); ^ user.cpp:44:14: warning: ‘pX’ may be used uninitialized in this function [-Wmaybe-uninitialized]