Exercise 5-1 Symbolic function (10 point(s))

This question requires the realization of the sign function sign(x).

Function interface definition:

int sign( int x );

Where x is an integer parameter passed in by the user. The sign function is defined as: if x is greater than 0, sign(x) = 1; if x is equal to 0, sign(x) = 0; otherwise, sign(x) = −1.

Sample referee test procedure:

#include <stdio.h>

int sign( int x );

int main()
{
    
    
    int x;

    scanf("%d", &x);
    printf("sign(%d) = %d\n", x, sign(x));

    return 0;
}

/* 你的代码将被嵌在这里 */

Input sample:

10

Sample output:

sign(10) = 1

answer:

int sign( int x )
{
    
      //若x大于0，sign(x) = 1；若x等于0，sign(x) = 0；否则，sign(x) = 1。
	if(x>0) return 1;
	else if(x==0) return 0;
	else return -1;
}