strtodouble vec

Converts a text comma or space seperated string of numbers into a double array

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Interface
Strtodouble Vec
Page Comments

Interface

C++

Strtodouble Vec

std::vector<double>strtodouble_vec( const char* str )

Converts a text string of numbers, with each number seperated by a comma or space, into a dynamically allocated double precision array.

Example

#include<stdio.h>
#include<codecogs/strings/strtodouble_vec.h>
int main()
{
  const char input[]="12.3,34.5,33 23 45.3 2";
  std::vector<double> ans=strtodouble_vec(input);
  for(int i=0;i<ans.size();i++)
    printf("\n [%d] = %lf",i,ans[i]);
}

Output

[0] = 12.300000
 [1] = 34.500000
 [2] = 33.000000
 [3] = 23.000000
 [4] = 45.300000
 [5] = 2.000000

Parameters

str	A text string of numbers, separated with commas or spaces

Source Code

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Page Comments

$bunbun68\′s Photo$

bunbun68

30 Oct 11, 9:41PM

Slow and unsafe code

1) It is not necessary to precompute how many fields there are in the string. You can just append to the vector as you are going along.<p> 2) What happens if some fields cannot be converted to a double (e.g. empty fields)?<p> 3) Returning vectors by value is inefficient for C++03. For more modern c++, you can use boost::spirit with simpler and much much faster code.

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