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/*
atod function by Alex Lowe
April 25, 1998 3:32AM v1.2
alowe@iadvance.net
www.iadvance.net
www.templecrc.com
Description:
Takes a string and converts it to double floating point.
Support for negative signs and decimal points in the string.
Syntax:
double atod(char *string)
Required Functions:
math.h [pow()], string.h [strlen()]
*/
#include
#include
#include
double atod(char *buf)
{
double mult=0, total=0;
int i,j;
int decloc = 0;
for (j=0, i=strlen(buf)-1; i >= 0; --i, ++j)
{
if (buf[i] == '.')
{
decloc = j;
i--;
}
if (buf[i]<='9' && buf[i]>='0')
total += (buf[i]-'0') * pow(10,j);
}
if (buf[0] == '-')
total = -total;
return total/pow(10,decloc);
}
void main()
{
double num;
num=atod("-123.456789");
printf ("\n%f\n", num);
}