编辑代码

#include<stdio.h>
int main()
{
	int num,abs;
	printf("请输入一个整数\n");
	scanf("%d",&num);
	if(num>=0){
		abs=num;
	}
	else{
		abs=-num;
	}
	printf("%d的绝对值是%d\n",num,abs);
	return 0;
}