问答题

main() {int s=0,k; for(k=8;k>=0;k--) {switch(k) {case 0: case 2:s++;break; case 4:s+=3;break; case 7: case 3:s--; case 6:break; case 1: case 5: case 8:s+=2;break; } } printf("s=%d\n",s); }

【参考答案】

s=9