Compilare: user.cpp: In function ‘int main()’: user.cpp:18:28: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 3 has type ‘unsigned char*’ [-Wformat=] fscanf(fi,"%u %u", &m, &n); ^ user.cpp:18:28: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 4 has type ‘unsigned char*’ [-Wformat=] user.cpp:21:30: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 3 has type ‘unsigned char*’ [-Wformat=] fscanf(fi,"%u",&a[i][j]); ^ user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%u %u", &m, &n); ^ user.cpp:21:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%u",&a[i][j]); ^