C++

Hello I want to turn the if statement into a while loop to loop through all instances of the provided lookFor string and end when no more can be found. Any assistance would be greatly appreciated

void replaceAllString(string& str, string lookFor, string replaceWith) { string::size_type idx; idx = str.find(lookFor);

if ( idx != string::npos ); { str.replace(idx,lookFor.size(), replaceWith);

idx = str.find(lookFor); }

return; }

Evoid replaceAllstring(string& str, string lookFor, string replacewith) { string: :size_type idx; idx = str.find(lookFor); if ( idx != string:: npos ); { str.replace(idx, lookFor.size(), replacewith); idx = str.find(lookFor); } return