Compilare: user.cpp: In function ‘int main()’: user.cpp:12:30: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[12]’ [-Wformat=] scanf("%d%d%s",&op,&n,&alfa); ^ user.cpp:18:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[5]’ [-Wformat=] scanf("%s",&s); nr=0; ^ user.cpp:9:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zimeria.in","rt",stdin); ^ user.cpp:10:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zimeria.out","wt",stdout); ^ user.cpp:12:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%s",&op,&n,&alfa); ^ user.cpp:18:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); nr=0; ^