how to split a C++ string to get whole string individually and some parts/characters of it

Question

My question is, how can I split a string in C++? For example, I have `

string str = "[ (a*b) + {(c-d)/f} ]"

1. It need to get the whole expression individually like [,(,a,*,b,......
2. And I want to get the brackets only like [,(,),{,(,),},] on their proper position

How can I do these with some easy ways

Answer 1

Here is a way I got to do this,

string expression = "[ (a*b) + {(c-d)/f} ]" ;
string token ;

// appending an extra character that i'm sure will never occur in my expression 
// and will be used for splitting here

expression.append("~") ; 
istringstream iss(expression);
getline(iss, token, '~');

for(int i = 0 ; i < token.length() ; i++ ) {
    if(token[i] != ' ' ) {
        cout<<token[i] << ",";
    }
}

Output will be: [,(,a,*,b,),+,{,(,c,-,d,),/,f,},],