Compilare: user.cpp: In function ‘long long int addn(long long int)’: user.cpp:12:9: warning: no return statement in function returning non-void [-Wreturn-type] x=x/10;}} ^ user.cpp: In function ‘long long int add(long long int*, long long int*)’: user.cpp:19:10: warning: no return statement in function returning non-void [-Wreturn-type] a[0]=i-1;} ^ user.cpp: In function ‘long long int mult(long long int*, long long int)’: user.cpp:26:10: warning: no return statement in function returning non-void [-Wreturn-type] a[0]=i-1;} ^ user.cpp: In function ‘long long int set(long long int*)’: user.cpp:31:8: warning: no return statement in function returning non-void [-Wreturn-type] a[0]=0;} ^ user.cpp: In function ‘int main()’: user.cpp:33:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.in","r",stdin); ^ user.cpp:34:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.out","w",stdout); ^ user.cpp:36:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&a,&b); ^