把一个浮点数转换为字符串

[c]代码库

#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\n", string, dec, sign );

	value = -123.45;
	ndig= 15;
	string = ecvt ( value,ndig,&dec,&sign );
	printf ( "string = %s dec = %d sign = %d\n",
	         string, dec, sign );


	value = 0.6789e5; /* scientific
                        notation */
	ndig = 5;
	string = ecvt ( value,ndig,&dec,&sign );
	printf ( "string = %s           dec = %d\
          sign = %d\n", string, dec, sign );

	return 0;
}