Compilare: main.cpp: In function 'int main()': main.cpp:19:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(minim>strlen(a[i])) ~~~~~^~~~~~~~~~~~~ main.cpp:35:14: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] v[0]=NULL; ^~~~ main.cpp:11:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.in" , "r" , stdin); ^ main.cpp:12:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.out" , "w" , stdout); ^ main.cpp:15:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &n); ^ main.cpp:18:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s" , a[i]); ^