Compilare: user.cpp: In function ‘unsigned int** readMatrix(FILE*, int*)’: user.cpp:10:30: warning: format ‘%hu’ expects argument of type ‘short unsigned int*’, but argument 3 has type ‘unsigned int*’ [-Wformat=] fscanf(in, "%hu", &m[i][j]); ^ user.cpp: In function ‘void royfloyd(unsigned int**, int)’: user.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s < m[i][j]) m[i][j] = s; ^ user.cpp: In function ‘unsigned int** readMatrix(FILE*, int*)’: user.cpp:4:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", n); ^ user.cpp:10:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%hu", &m[i][j]); ^