把数分为指数和尾数

[c]代码库

#include <math.h> 
#include <stdio.h> 

int main(void) 
{ 
   double fraction, integer; 
   double number = 100000.567; 

   fraction = modf(number, &integer); 
   printf("The whole and fractional parts of %lf are %lf and %lf\n", 
          number, integer, fraction); 
   return 0; 
}