如何在各种标志处切割弦

Question

I´ve got the following problem: I read in WinCC Variables from a .csv file. Now there is a string which contains the ip address. It looks like this: I0043CTRL/CALH1$ST$Beh$stVal;Len=4;MMSType=133;Flag=RW

The Address in this example is I0043 .

Now I want to cut the string after the address, but there are more possible name of the variabel, for example I0043PROT/... .

Is there any possibility to tell for example getline to end at various signs? Like: getline(tmp_stringstream,tmp_string, 'C' || 'P');

Thank you

Patrick

Answer 1

boost::split does what you need: http://www.boost.org/doc/libs/1_53_0/doc/html/string_algo/usage.html#idp163440592

std::string mystring("asd,ff.erw qewr");
std::vector<std::string> tokens;
boost::split( tokens, mystring, boost::is_any_of(",.-/ ") );

Answer 2

In C runtime library there's a string tokenizer function, strtok (include < string.h>)

In C++ runtime there's an equivalent std::strtok (include < cstring>)

Answer 3

You can use std::string::find_first_of , and std::string::substr :

string line("I0043CTRL/CALH1$ST$Beh$stVal;Len=4;MMSType=133;Flag=RW");

cout << line.substr(0, line.find_first_of("CP"));

output:

I0043