请教一下各位高手，小弟初学，始终想不出该如何做，望指教！！！

main()
{
  int a,b,c;
  scanf("%d %d %d",&a,&b,&c);
  printf("a=%d  b=%d  c=%d\n",a,b,c);
  if(a<b)
  {
      if(a<c)
      {
          if(b<c)
              printf("c>b>a");
          else
              printf("b>c>a");
      }
      else
      {
          if(b<a)
              ;
          else
              printf("b>a>c");

      }
  }
  else
  {
      if(b<c)
      {
          if(a<c)
              printf("c>a>b");
          else
              printf("a>c>b");
      }
      else if(b<a)
              printf("a>b>c");



  }
  printf("\n");
  
}

main()
{
   int a,b,c,t;
   scanf("%d,%d,%d",&a,&b,&c);
   if(a<b){t=a;a=b;b=t;}
   if(a<c){t=a;a=c;c=t;}
   if(b<c){t=b;b=c;c=t;}
   printf("%d>%d>%d",a,b,c);
}

以前写的
/***************************
*输入3个数按大小输出
*
***************************/
#include <stdio.h>

void main()
{
    int a,b,c,x;
    printf("请输入3个数: ");
    scanf("%d %d %d",&a,&b,&c);
    if(a>b) x=a,a=b,b=x;
    if(b>c) x=b,b=c,c=x;
    if(a>b) x=a,a=b,b=x;
    printf("3个数小到大的顺序:%d %d %d\n",a,b,c);
}