浮點數轉換爲字符串

#include "stdlib.h"

char *F2S(double d, char* str)
{
char str1[40];
int j=0,k,i;
i = (int)d; //浮點數的整數部分
//d = d-(int)d;
while(i>0)
{
str1[j++] = i%10+'0';
i /= 10;
}
for(k=0;k<j;k++)
str[k] = str1[j-1-k]; //

str[j++] = '.';
d -= (int)d;
for(i=0;i<10;i++)
{
d *= 10;
str[j++] = (int)d+'0';
d -= (int)d;
}
while(str[--j]=='0');
str[++j] = '\0';
return str;
}


int main(int argc, char* argv[])
{
double d = 365.897003120000;
char str[20];
char *p = F2S(d, str);
printf("%s\n",str);
printf("%s\n",p);

return 0;
}