- 408 名前：デフォルトの名無しさん mailto:sage [2007/11/13(火) 01:52:52 ]
- >>404
double strtof(const char *nptr)
{
double ret = 0, div = 10, f = 1;
if(*nptr=='-') {
f = -1;
nptr++;
}
else if(*nptr=='+') nptr++;
while('0' <= *nptr && *nptr <= '9') ret = ret * 10 + *nptr++ - '0';
if(*nptr++!='.') return f * ret;
while('0' <= *nptr && *nptr <= '9') {
ret += (*nptr++ - '0') / div;
div *= 10;
}
return ret * f;
}
