Whether or not there is life in outer space is an enigma. We may never know for sure until we are capable of space travel or aliens actually land on our planet. Enigma means:
【单选题】若有程序 fun(int a,int b) { static int c=0 c+=a+b; retum c } main () { int x=5,y=3,z=7,r r=fun((y,x+y),z); r=fun(x,y) printf('%d/n',r); } 上面程序的输出结果______。