How to print only The Numbers from a alphanumeric String?

Question

Eg.
Input sdg45mkf567kdd3j(Take Input As A String)
Output 45 567 3

Answer 1

Is this what you mean?

https://code.sololearn.com/c7CsfGVC0JPF/?ref=app

Answer 2

Use regular expressions...
As methods names depends on wich language implementation, example in Javascript:

var inp = 'sdg45mkf567kdd3j';

var out = inp.replace(/[^\d]+/g,' ');
console.log('>'+out+'<');

... or in two times, to strip eventuals boundings spaces:

var out = inp.replace(/^[^\d]+|[^\d]+$/g,'').replace(/[^\d]+/g,' ');
console.log('>'+out+'<');

Answer 3

If I know how, I would recommend it like @visph example, using RegEx, less code to write, and no need to reinvent the wheel :)

Answer 4

@Ipang: so, I suppose there's no built-in regex parser in C++? But I guess there's some in Java, doesn't it?

Answer 5

@visph, I really don't know how to use regex in C++, as a matter of fact I'm still having difficulties understanding the meaning/usage of regex string filter, maybe I should make this a homework :)

Answer 6

No, I can't: I never have used regular expression with those languages... I can do it in Python if you want ^^

Answer 7

@visph Can You Send Me The Codes In C,c++ or Java??
I am not familiar with JavaScript..
So plzz

Answer 8

yeah!!
Thank You Very Much 😊