Getting numbers out of a string.

[HugoFromBOSS]

Hello,

I am using the Linux command "du -sb /root/" to get the number of bytes of the folder root. This of course returns something like:

1775440949 /root/

the number of bytes changes. How can I get C++ to take the string with "1775440949 /root/" in it a just get the numbers and put them into a separate string.

Thanks

[Ganon11]

I think you should be able to use a stringstream for this.

[HugoFromBOSS]

Thankyou :)

Oh one other question. The string goes onto two lines like:

"42342423
<blank>"

how do I just get the first line?

Thanks

[hsn]

for your first question to get a number out of a string use the following code
string str="123";
int size=str.size() ;
int sum;
for(int i=0; i<size; i++)
sum= (sum*10) str[i]-'0';

by using this code you will be able to transfer the number.

for your 2nd question
use the function getline();
string str="123\n";
string str2;
getline(str,str 2);
by that str2 = "123";

good luck and i hope i was helpful

regards
hsn

[HugoFromBOSS]

WOW Thanks!

Thanks alot for your help guys!

[HugoFromBOSS]

woops!

Had a bit of a problem...

cannot convert ‘std::string’ to ‘char**’ for argument ‘1’ to ‘__ssize_t getline(char**, size_t*, FILE*)’

Any ideas?