Compilare: main.cpp: In function 'int query(int, int, int, int)': main.cpp:31:9: warning: unused variable 'ok' [-Wunused-variable] int ok = 1; ^~ main.cpp: In function 'int i32()': main.cpp:69:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LEN,f); ^ main.cpp:77:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LEN,f); ^