>>970
#include<stdio.h>
void swap(int *x, int *y)
{
int tmp;
tmp = *x;
*x = *y;
*y = tmp;
}
int main()
{
int a, b, c;
fputs("a = ", stdout);
scanf("%d", &a);
fputs("b = ", stdout);
scanf("%d", &b);
fputs("c = ", stdout);
scanf("%d", &c);
printf("before: a = %d, b = %d, c = %d\n", a, b, c);
if (a < b) swap(&a, &b);
if (b < c) swap(&b, &c);
if (a < b) swap(&a, &b);
printf("after : a = %d, b = %d, c = %d", a, b, c);
return 0;
}