Compilare: main.cpp: In function 'void read()': main.cpp:50:9: warning: unused variable 'x' [-Wunused-variable] int x; ^ main.cpp: In function 'void Read(int&)': main.cpp:22:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:27:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^