cut strings with multiple enddelimiter

Question

i´m trying to figure out a substring between two different characters. the string looks like:

channelBlock_0\d_off_mux=8, 8, 8, 8, 8, 8, 8, 8
channelBlock_0\d_selvth=true, true, true, true, true, true, true, true

i want to split after the '=' and before the first ','

cutting after '=' already works for me... here´s what i got:

std::string line;             //contains the string from above
std::string startDel = "=";
std::string endDel   = ",";

cout << line.substr(line.find(startDel)+1,line.find(endDel));

my output looks like this:

8, 8, 8, 8, 8, 8, 8, 8
true, true, true, true, true

how can i cut after the first ',' so my output is just

8
true

Answer 1

After checking substring(), you can see that what you need is:

line.substr(line.find(startDel) + 1, line.find(endDel) - (line.find(startDel) + 1));

since the second argument of the method states:

len

Number of characters to include in the substring (if the string is shorter, as many characters as possible are used).