下列程序运行后的输出结果是( )。
public class Sun
public static void main(String args[])
int i，j，s；
s=0；
for(i=1；i＜=3；i++)
for(j=0；j＜=i-1；j++)
s=s+1；
System.out.println(s)；
A．6
B．5
C．4
D．3
参考答案：A
解析： 本题考查对for循环语句理解。第1重for循环共有3次，第2重for循环共有2次，所以总共执行6次循环，每次循环s的值加1，因此s=6。故本题答案是A。
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| John left the United States in 1969 to work in Africa. Africa was hot. When John 1 to the United States in 1979, he said to himself, " It's much 2 here than it was before I left. I'm going to 3 an electric heater (电热器). Besides, everything is much more 4 ." John went to a store the next day to buy an electric heater. The salesman 5 him three or four 6 kinds and then said, " And this is our best electric heater. It 7 a lot, but it 8 half of your electricity (电), and electricity is very expensive now, isn't it?" "Yes, it's very expensive," John answered, " and it's becoming 9 every year." He looked at the electric heater carefully, thought for a few seconds and then said, "Well, I'll take 10 of these, then I'll save all of my electricity." | ||||
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