ldexp

函数名: ldexp

功 能: 计算value*2的幂

用 法: double ldexp(double value, int exp);

程序例:

#include

#include

int main(void)

{

double value;

double x = 2;

/* ldexp raises 2 by a power of 3

then multiplies the result by 2 */

value = ldexp(x,3);

printf("The ldexp value is: %lf

",

value);

return 0;

}