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c++

Extract data from c++ string

I wanted to extract the values from the string in C++. I guess this is not the C++ way of doing this, but that one in particular doesn't work. Any ideas?

string line = "{10}{20}Hello World!";
int start;
int end;
string text;

// What to use here? Is the sscanf() a good idea? How to implement it?

cout << start; // 10
cout << end; // 20
cout << text; // Hello World!
Solution

  • Although you can make sscanf work, this solution is more appropriate for C programs. In C++ you should prefer string stream:

    string s("{10}{20}Hello World!");
stringstream iss(s);

    Now you can use the familiar stream operations for reading input into integers and strings:

    string a;
int x, y;
iss.ignore(1, '{');
iss >> x;
iss.ignore(1, '}');
iss.ignore(1, '{');
iss >> y;
iss.ignore(1, '}');
getline(iss, a);

    Demo.