Compilare: main.cpp: In function 'int main()': main.cpp:45:13: warning: unused variable 'x' [-Wunused-variable] int x = N; ^ main.cpp: In function 'void Read(int&)': main.cpp:23:42: 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:28:42: 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; ^