C++程序设计实践教程思考题答案.docx

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1、实验1C++基础6．编写程序，输入某大写字母的ASCII码值，输出该字母的对应小写字母。#includeusingnamespacestd;intmain(){inti;cin>>i;if(i>=65&&1<=90)cout<#includeusingnamespacestd;intmain(){floata,b,

2、c;cout<<"请输入直角三角形的两条边长：";cin>>a>>b;c=sqrt(a*a+b*b);cout<<"直角三角形的斜边="<usingnamespacestd;intmain(){charc;1cout<<"请输入一个字符：";cin>>c;if(c>='A'&&c<='Z')c+='a'-'A';cout<

3、s”；否则，输出“failed”。#includeusingnamespacestd;intmain(){floatgrade;cout<<"请输入成绩：";cin>>grade;if(grade>=60)cout<<"pass"<#includeusingnamespacestd;intmain(){doublex,y;cout<<"请输入一个数x:";cin>>x;if(!x)y=cos(x)-pow(x,2)+3*x;el

4、sey=sin(x)+sqrt(pow(x,2)+1)+3*x;cout<<"y="<usingnamespacestd;intmain(){charc;cout<<"Enteracharacterofnumbersbetween1and7:";cin>>c;switch(c){case'1':cout<<"Monday";break;case'2':cout<<"Tuesdag";break;case'3':cout<<"Wenesday"

5、;break;case'4':cout<<"Thursday";break;case'5':cout<<"Friday";break;case'6':cout<<"Saturday";break;case'7':cout<<"Sunday";break;default:cout<<"wrongnumber";}cout<usingnamespacestd;intmain(){cout<<"输入简单的算术表达式：(数操作符数)";intleftO

6、perand,rightOperand;charOperator;cin>>leftOperand>>Operator>>rightOperand;intresult;switch(Operator){case'+':result=leftOperand+rightOperand;break;case'-':result=leftOperand-rightOperand;break;case'*':3result=leftOperand*rightOperand;break;case'/':if(rightOperand!=0)result=leftOperand/rightOp

7、erand;else{cout<<"除数为0，除法不能进行"<usingnamespacest