Compilare: main.cpp: In function 'int main()': main.cpp:47:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(l1<v[i-1].size()&&l2<v[i].size()) ~~^~~~~~~~~~~~~~ main.cpp:47:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(l1<v[i-1].size()&&l2<v[i].size()) ~~^~~~~~~~~~~~ main.cpp:73:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;l1<v[i-1].size();l1++) ~~^~~~~~~~~~~~~~ main.cpp:80:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;l2<v[i].size();l2++) ~~^~~~~~~~~~~~ main.cpp: In function 'int numar()': main.cpp:17:41: 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:25:41: 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:34:33: 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); ^