Question

I’m trying to convert the expression “5 + b * 18” to “5+16.89*18”. My problem is inside the while loop. I managed to remove the spaces.

My code:

double number = 16.89;
size_t found;
ostringstream converted;
string str ("5 + b * 18");

str.erase(remove(str.begin(),str.end(),' '),str.end());

found = str.find_first_of (VALID_CHARS);

while (found != string::npos)
 {        
  converted << fixed << setprecision (8) << number;        
  str.insert(found, converted.str());                                               
  found = str.find_first_of (VALID_CHARS,found + 1);
 }

Can anyone help me?

Ty

Answer 1

insert() will shift the contents of the string to the right after the inserted text, but does not delete the character at the given position. You should use replace(), specifying a size of ` (to replace just a single character)