下列程序的输出结果是 :#include <stdio.h>void f(int v, int w) { int t; t = v; v = w; w = t;}int main(){ int x = 1, y = 3, z = 2; if (x > y)f(x, y); else if (y > z)f(y, z); else f(x, z); printf("%d, %d, %d\n", x, y, z); return 0;}