Compilare: user.cpp: In function ‘int main()’: user.cpp:38:15: warning: right operand of comma operator has no effect [-Wunused-value] for(j=1,ct;j<=ct1;j++) ^ user.cpp: In function ‘void calc()’: user.cpp:18:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&k,&i); ^ user.cpp: In function ‘int main()’: user.cpp:33:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("z.in","r",stdin); ^ user.cpp:34:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("z.out","w",stdout); ^ user.cpp:35:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld",&x,&m,&ct1); ^