ecvt

函数名: ecvt

功 能: 把一个浮点数转换为字符串

用 法: char ecvt(double value, int ndigit, int *decpt, int *sign);

程序例:

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

int main(void)

{

char *string;

double value;

int dec, sign;

int ndig = 10;

clrscr();

value = 9.876;

string = ecvt(value, ndig, &dec, &sign);

printf("string = %s dec = %d

sign = %d

", string, dec, sign);

value = -123.45;

ndig= 15;

string = ecvt(value,ndig,&dec,&sign);

printf("string = %s dec = %d sign = %d

",

string, dec, sign);

value = 0.6789e5; /* scientific

notation */

ndig = 5;

string = ecvt(value,ndig,&dec,&sign);

printf("string = %s dec = %d

sign = %d

", string, dec, sign);

return 0;

}