Ah, sorry. C++ on the brain :-) Barış
On 2 Jan 2012, at 15:54, Axel Freyn <[email protected]> wrote: > Hi, > you see undefined behaviour: when you try in C to change a const via a > non-const pointer, the compiler is allowed to do anything. > However, in C++ it's an error. > > Hth, > Axel > > (I Don't have a standard here, so I might be wrong...) > > Am 02.01.2012 16:40 schrieb "mandeep" <[email protected]>: > oops a little mistake....i got 101,100 output for the following program > written in C. > so here *p again unable to manage value of variable sum. > > I think it's not possible to change the value of variable const sum. > > u can check it out on this link http://codepad.org/ > > #include <stdio.h> > int main() > { > int const sum=100; > int *p=∑ > > *p=101; > > printf("%d, %d",*p,sum); > return 0; > } > > On Mon, Jan 2, 2012 at 6:57 PM, Baris Acar <[email protected]> wrote: > Shoubhik, what compiler are you using? I think the line: > >>> int *p=∑ > > Should not compile per the standard. See http://ideone.com/ujHY5 > > > prog.cpp:5: error: invalid conversion from ‘const int*’ to ‘int*’ > Happy New Year, Gregorian Calendar observers! > > Barış > > On 2 Jan 2012, at 07:48, mandeep <[email protected]> wrote: > >> Well,p points to address of variable sum and when we change value of >> *p,then it change value at that address,thats why u got this output. >> >> On 1/2/12, Shoubhik <[email protected]> wrote: >>> >>> int main() >>> { >>> int const sum=100; >>> int *p=∑ >>> >>> *p=101; >>> >>> >>> printf("%d, %d",*p,sum); >>> return 0; >>> } >>> >>> /* >>> >>> output >>> >>> 101, 101 >>> >>> */ >>> >>> p points to a constant integer variable, then why/how does *p manage >>> to change the value of sum? >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Google Code Jam" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/google-code?hl=en. >>> >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google Code Jam" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/google-code?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Google Code Jam" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-code?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Google Code Jam" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-code?hl=en. > -- > You received this message because you are subscribed to the Google Groups > "Google Code Jam" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-code?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Code Jam" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-code?hl=en.
