Compilare: user.cpp: In function ‘int main()’: user.cpp:13:52: warning: unused variable ‘i’ [-Wunused-variable] short v1[40], v2[40], v3[40],r[40],l1,l2,l3,lr,i; ^ user.cpp:17:10: warning: unused variable ‘n’ [-Wunused-variable] char n[15]; ^ user.cpp:12:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("quadratum.in","r",stdin); ^ user.cpp:15:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("quadratum.out","w",stdout); ^ user.cpp:18:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd",&T); ^