Compilare: user.cpp: In function ‘int expresie()’: user.cpp:52:11: warning: variable ‘cpoz’ set but not used [-Wunused-but-set-variable] int r,cpoz; ^ user.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int factor()’: user.cpp:110:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:129:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.in","r",stdin); ^ user.cpp:130:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.out","w",stdout); ^ user.cpp:131:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",v); ^