while(scanf("%d %d",&evil,&evil2)==2)

#include<stdio.h>
int imin(int,int);
int main()
{
  int evil1,evil2;

  printf(“enter a pair of integer(q to quit):\n”);
  while(scanf(“%d %d”,&evil1,&evil2)==2)
  {
    printf(“the lesser of %d and %d is %d.\n”,
  evil1,evil2,imin(evil1,evil2));
 printf(“enter a pair of integer(q to quit);\n”);
  }
  printf(“bye.\n”);
  return 0;
}

int imin(int n,int m)
{
  int min;
  if(n<m)
   min=n;
  else
   min=m;
  return min;
}

中间那句while(scanf(“%d %d”,&evil1,&evil2)==2)
是什么意思啊？高手指导下！谢谢！