how to convert a base 8 number into decimal number... help me pls thks

[c2h]

pls help to solve this problem : using C programming to convert a base 8 number into a decimal number... thks

[Banfa]

Do you mean a string containing a base 8 number?

C/C++ only operates in 1 base, base 2 (binary), all other bases are just input/output notations because humans find binary a little hard to read.

[c2h]

Hi, Banfa... thanks for your reply. I also not very sure. But the question is : using a appropriate programming language, write a program that convert a whole number input by the user from base 8 to base 10. The program should flag as an error any input that contain 8 or 9.

i very appreciate ur reply. can u suggest for me what else programming language is appropriate to this question.. ? thanks

[Banfa]

A-ha the real specification always helps.

So you need to convert an ASCII string of digits to a binary value assuming that the string of digits is given in base 8.

The is a function in the standard library that will do this without too much hassle

long strtol ( const char * string, char** endptr, int radix );

Look it up, it is declared in stdlib.h

[c2h]

haha.... thankyou.... actually i not very understand, but i will try to find it out...
thanks you a lot