Compilare: user.cpp: In function ‘int main()’: user.cpp:12:15: warning: NULL used in arithmetic [-Wpointer-arith] while(cs!=NULL&&cs!='\n') ^ user.cpp:9:9: warning: unused variable ‘n’ [-Wunused-variable] int n,i,l=0,cuv=0; ^ user.cpp:9:11: warning: unused variable ‘i’ [-Wunused-variable] int n,i,l=0,cuv=0; ^ user.cpp:7:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text.in","r",stdin); ^ user.cpp:8:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text.out","w",stdout); ^ user.cpp:11:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c%c",&cs,&c); ^ user.cpp:19:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^