If i have a int say 306. What is the best way to separate the numbers 3 0 6, so I can use them individually? I was thinking converting the int to a string then parsing it?
int num; stringstream new_num; new_num << num; Im not sure how to do parse the string though. Suggestions?
Without using strings, you can work backwards. To get the 6,
306 % 10This will print each digit backwards:
while (num > 0) { cout << (num % 10) << endl; num /= 10; } Just traverse the stream one element at a time and extract it.
char ch; while( new_num.get(ch) ) { std::cout << ch; } Charles's way is much straight forward. However, it is not uncommon to convert the number to string and do some string processing if we don't want struggle with the math:)
Here is the procedural we want to do :
306 -> "306" -> ['3' ,'0', '6'] -> [3,0,6] Some language are very easy to do this (Ruby):
>> 306.to_s.split("").map {|c| c.to_i} => [3,0,6] Some need more work but still very clear (C++) :
#include <sstream> #include <iostream> #include <algorithm> #include <vector> int to_digital(int c) { return c - '0'; } void test_string_stream() { int a = 306; stringstream ss; ss << a; string s = ss.str(); vector<int> digitals(s.size()); transform(s.begin(),s.end(),digitals.begin(),to_digital); } 
to_digital() doesn't work for all encodings.Loop string and collect values like
int val = new_num[i]-'0'; 
