Compilare: user.cpp: In function ‘int verif(int, int)’: user.cpp:14:11: warning: unused variable ‘ok’ [-Wunused-variable] int l,ok; ^ user.cpp: In function ‘int main()’: user.cpp:38:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(a[i]);j++) ^ user.cpp:50:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(a[i+1]);j++) ^ user.cpp:57:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(a[i+1]);j++) ^