If k is integer, how many times will the following "while" loop be executed?k = 50 while k > 1: print(k) k = k // 2 A: 3 B: 4 C: 5 D: 6

对用户输入的数值限制为正数，如果输入了负数，则要求重新输入。下面________可以实现。 A: Dim x As IntegerDo x = Val(InputBox("请输入数据"))Loop While x < 0 B: Do x = Val(InputBox("请输入数据"))Loop While x > 0 C: Do While x > 0 x = Val(InputBox("请输入数据"))Loop D: x = Val(InputBox("请输入数据"))If x < 0 ThenEnd If E: For x < 0 x = Val(InputBox("请输入数据"))Next

k为整型，以下while循环体中的语句执行（）。k=2;while(k=0){cout<<k;k--;cout<<" ";}? 0次|1次|无限次|2次

有语句"var x=0;while(){x+=2;}",要使while循环执行10次,小括号中应该填写? A: x<10 B: x<=10 C: x<20 D: x<=20

while后面的“条件表达式”一定要用一对______括起来。 A: 圆括号() B: 方括号[ ] C: 花括号{ } D: 双引号 " "

The difficulty of e-commerce security lies in . A: it is a game between " While the devil climbs a foot, the priest climbs ten " and " While the priest climbs a foot, the devil climbs ten " B: security measures and user experience are always a difficult contradiction to solve C: it is difficult to achieve the best match between technical means and management level D: the balance between security and ease of use

The Latin term for the sentiment "Gather ye rosebuds while ye may" is Carpe Diem.（ ）

对若干个正数求和，输入“ok”结束，下面正确的代码是（ ）。知识点：while循环。 A: s = 0x = input()while x!="ok": s += int(x) print(s) B: s = 0while True: x = input() if x=="ok": break s += int(x) print(s) C: s = 0x = input()while x!="ok": s += int(x) x = input()print(s) D: s = 0while x!="ok": x = input() s += int(x) print(s)

若变量已正确定义，有以下程序段i=0;do printf("%d,",i); while( i++ );printf("%d ",i);其输出结果是_______。 A: 0,0 B: 1,1 C: 0,1 D: 程序进入无限循环

以下Java的条件、循环结构的写法，有输出效果、且没有错误的有哪些？ A: …… if(true){ System.out.println("hello"); }…… B: ……if(true); { System.out.println("hello");}…… C: ……while(1){ System.out.println("hello"); }…… D: …… if(true) System.out.println("hello"); ……