Compilare: user.cpp: In function ‘void read()’: user.cpp:25:39: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘int*’ [-Wformat=] fscanf(in, "%ld", &M[i][j]); ^ user.cpp:22:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld%ld", &nr_linii, &nr_coloane); ^ user.cpp:25:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld", &M[i][j]); ^