double.c

linux下的Ｃ语言开发

/*-*/
/********************************************************
 * Name:						*
 *	double						*
 *							*
 * Purpose:						*
 *	Demonstrates how to read a number		*
 *							*
 * Usage:						*
 *	Run the program.				*
 *	Type a number.					*
 *	Get results.					*
 *							*
 * Notes:						*
 *	No error checking is done on the input.		*
 ********************************************************/
/*+*/
#include <stdio.h>
char  line[100];   /* input line from console */
int   value;       /* a value to double */

int main()
{
    printf("Enter a value: ");

    fgets(line, sizeof(line), stdin);
    sscanf(line, "%d", &value);

    printf("Twice %d is %d\n", value, value * 2);
    return (0);
}