Compilare: user.cpp: In function ‘void update(int)’: user.cpp:15:9: warning: unused variable ‘l1’ [-Wunused-variable] int l1,l2,nod,i,k; ^ user.cpp:15:12: warning: unused variable ‘l2’ [-Wunused-variable] int l1,l2,nod,i,k; ^ user.cpp:15:15: warning: unused variable ‘nod’ [-Wunused-variable] int l1,l2,nod,i,k; ^ user.cpp: In function ‘int main()’: user.cpp:91:21: warning: unused variable ‘nod’ [-Wunused-variable] int nod = a; ^ user.cpp:100:21: warning: unused variable ‘nod’ [-Wunused-variable] int nod = a; ^ user.cpp:67:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prietene.in","r",stdin); ^ user.cpp:68:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prietene.out","w",stdout); ^ user.cpp:70:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^ user.cpp:73:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:78:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp:82:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&op); ^ user.cpp:85:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch); ^ user.cpp:86:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c%d%d",&ch,&a,&b); ^