ecvt把一个浮点数转换为字符串

#include <stdlib.h> #include <stdio.h> #include <conio.h> int main(void) {    double value= -8.6789e5;    int dec, sign;    int ndig = 5;    char *p = ecvt(value,ndig,&dec,&sign);    printf("string = %s     dec = %d   sign = %d\n", p, dec, sign);       system( "pause" );    return 0; }   /*=============string = 86789    dec = 6   sign = 1请按任意键继续. . .===================*/