Compilare: main.cpp: In function 'int main()': main.cpp:77:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<nod[0][0].size();i++){ ~^~~~~~~~~~~~~~~~~ main.cpp:92:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<nod[nd][0].size();i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int cit()': main.cpp:17:34: 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,BLen,fi); ^ main.cpp:29:34: 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,BLen,fi); ^ main.cpp: In function 'int main()': main.cpp:56:26: 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,BLen,fi); ^