Compilare: main.cpp: In function 'int main()': main.cpp:120:37: warning: variable '_it' set but not used [-Wunused-but-set-variable] set<segm_t> :: iterator _it = stuff.lower_bound({x[it.first.second],y[it.first.second],x[it.first.second],y[it.first.second],it.first.second}); ^~~ main.cpp: In function 'int i32()': main.cpp:53:32: 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:61:32: 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); ^