C++, best way to change a string at a particular index

Question

I want to change a C++ string at a particular index like this:

string s = \"abc\";
s[1] = \'a\';

Is the following code valid? Is this an a

Answer 1

Yes the code you have written is valid. You can also try:

string num;
cin>>num;
num.at(1)='a';
cout<

the std::replace can also be used to replace the charecter. Here is the reference link http://www.cplusplus.com/reference/string/string/replace/

Hope this helps.