Compilare: user.cpp: In function ‘int main()’: user.cpp:11:9: warning: unused variable ‘cnt’ [-Wunused-variable] int cnt=0,l,j=1; ^ user.cpp:11:15: warning: unused variable ‘l’ [-Wunused-variable] int cnt=0,l,j=1; ^ user.cpp:11:17: warning: unused variable ‘j’ [-Wunused-variable] int cnt=0,l,j=1; ^ 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("editor.in","r",stdin); ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("editor.out","w",stdout); ^ user.cpp:10:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:24:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^