Compilare: user.cpp: In function ‘void citire()’: user.cpp:38:16: warning: unused variable ‘a’ [-Wunused-variable] double a,b,c; ^ user.cpp:38:18: warning: unused variable ‘b’ [-Wunused-variable] double a,b,c; ^ user.cpp:38:20: warning: unused variable ‘c’ [-Wunused-variable] double a,b,c; ^ user.cpp:35:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:39:71: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf %lf", &drepte[i].a, &drepte[i].b, &drepte[i].c); ^ user.cpp: In function ‘int main()’: user.cpp:83:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drepte3.in","r",stdin); ^ user.cpp:84:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drepte3.out","w",stdout); ^