#include <stdio.h>
void main()
{
    int a,b,c,t;
    printf("input a,b c:");
    scanf("%d%d%d\n",&a,&b,&c);
    printf("a=%d,b=%d,c=%d\n",a,b,c);
    if (a>b)
    { t=a;a=b;b=t;}
    if(b>c)
    { t=b;b=c;c=t;}
    if (a>b)
    { t=a;a=b;b=t;}
    printf("a=%d,b=%d,c=%d\n",a,b,c);
}

这个程序为什么运行后要再重新输入一次才可以排序的呢？？？？？？求各位大侠指教指教

#include <stdio.h>
 void main()
 {
     int a,b,c,t;
     printf("input a,b c:");
     scanf("%d%d%d\n",&a,&b,&c);
     printf("a=%d,b=%d,c=%d\n",a,b,c);
     if (a>b)
     { t=a;a=b;b=t;}
     if(b>c)
     { t=b;b=c;c=t;}
     if (a>b)
     { t=a;a=b;b=t;}
     printf("a=%d,b=%d,c=%d\n",a,b,c);
 }
不用\n