张士玉小黑屋

#include<stdio.h>intmain(){   intabs(inty);   intx,c;      scanf("%d",&c);   x=abs(c);   printf("jdz=%d",x);   return0;}intabs(inty){      if(y<0)y=-y;      returny;}  //亲爱的小萌新一定要自己敲写代码哦！