Compilare: user.cpp: In function ‘int valid()’: user.cpp:7:6: warning: unused variable ‘i’ [-Wunused-variable] int i,ok(1),suma,suma1; ^ user.cpp:7:14: warning: unused variable ‘suma’ [-Wunused-variable] int i,ok(1),suma,suma1; ^ user.cpp:7:19: warning: unused variable ‘suma1’ [-Wunused-variable] int i,ok(1),suma,suma1; ^ user.cpp: In function ‘int main()’: user.cpp:31:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.in","r",stdin); ^ user.cpp:32:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.out","w",stdout); ^