建站系统下载,黑马程序员培训机构,网站必须做商标么,网络舆情监测与预警系统通过对海量C中的运算符总结#xff08;4#xff09;#xff1a;逻辑运算符#xff08;下#xff09;
以下程序演示了如何使用条件语句和逻辑运算符根据变量的值执行不同的代码行#xff1a;
#include iostream
using namespace std;int main()
{cout Use …C中的运算符总结4逻辑运算符下
以下程序演示了如何使用条件语句和逻辑运算符根据变量的值执行不同的代码行
#include iostream
using namespace std;int main()
{cout Use boolean values(0 / 1) to answer the questions endl;cout Is it raining? ;bool isRaining false;cin isRaining;cout Do you have buses on the streets? ;bool busesPly false;cin busesPly;// Conditional statement uses logical AND and NOTif (isRaining !busesPly)cout You cannot go to work endl;elsecout You can go to work endl;if (isRaining busesPly)cout Take an umbrella endl;if ((!isRaining) busesPly)cout Enjoy the sun and have a nice day endl;return 0;
}输出
Use boolean values(0 / 1) to answer the questions
Is it raining? 1
Do you have buses on the streets? 1
You can go to work
Take an umbrella再次运行的输出
Use boolean values(0 / 1) to answer the questions
Is it raining? 1
Do you have buses on the streets? 0
You cannot go to work最后一次运行的输出
Use boolean values(0 / 1) to answer the questions
Is it raining? 0
Do you have buses on the streets? 1
You can go to work
Enjoy the sun and have a nice day第 15 行包含条件表达式 (isRaining !busesPly)可将其读作 “下雨且没有公交车”。这个表达式使用了逻辑 AND 运算符将没有公交车对有公交车执行逻辑 NOT 运算和下雨关联起来。
以下程序演示了如何将逻辑运算符 NOT 和 OR ! 和 ||用于条件处理。
#include iostream
using namespace std;int main()
{cout Answer questions with 0 or 1 endl;cout Is there a discount on your favorite car? ;bool onDiscount false;cin onDiscount;cout Did you get a fantastic bonus? ;bool fantasticBonus false;cin fantasticBonus;if (onDiscount || fantasticBonus)cout Congratulations, you can buy that car! endl;elsecout Sorry, waiting a while is a good idea endl;if (!onDiscount)cout Car not on discount endl;return 0;
}输出
Answer questions with 0 or 1
Is there a discount on your favorite car? 0
Did you get a fantastic bonus? 1
Congratulations, you can buy that car!
Car not on discount再次运行的输出
Answer questions with 0 or 1
Is there a discount on your favorite car? 0
Did you get a fantastic bonus? 0
Sorry, waiting a while is a good idea
Car not on discount最后一次运行的输出
Answer questions with 0 or 1
Is there a discount on your favorite car? 1
Did you get a fantastic bonus? 1
Congratulations, you can buy that car! 分析
这个程序建议您能够打折或得到很高的补贴时就把车买了不然就再观望观望。它还在第 19 行使用了逻辑非运算来提醒您不打折。第 14 行使用了一条 if 语句而第 16 行是与之配套的 else 语句。在条件 (onDiscount || fantasticBonus) 为 true 时将执行第 15 行的语句。这个表达式包含逻辑运算符||仅当您喜欢的汽车打折或能够获得很高的补贴时 该表达式才为 true。当该表达式为 false 时 将执行 else语句后面的语句第 17 行。
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