Compilare: main.cpp: In function 'int main()': main.cpp:108:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; ++i){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int get_nr()': main.cpp:28:45: 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 , DIMBUFF , fin); ^ main.cpp:37:45: 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 , DIMBUFF , fin); ^ main.cpp: In function 'int main()': main.cpp:56:37: 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 , DIMBUFF , fin); ^ main.cpp:50:15: warning: 'ndr' may be used uninitialized in this function [-Wmaybe-uninitialized] int nst , ndr , changed , ii; ^~~ main.cpp:219:24: warning: 'nst' may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = 1 ; i <= st ; ++i) ~~^~~~~