c#程序设计基础.doc

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1、C#程序设计基础–洪恩第一章C#与.Net1)第一个C#程序usingSystem;namespacehelloworld{classHelloWorld{staticvoidMain(string[]args){Console.WriteLine("HelloWorld");}}}第二章基本概念和语法1)数据类型namespacedatatype{classRealDemo{staticvoidMain(string[]args){floatx=3.14159F;doubley=3.14159265358979;Consol

2、e.WriteLine("x={0}",x);Console.WriteLine("y={0}",y);floatt=x;x=(float)y;y=t;Console.WriteLine("x={0}",x);Console.WriteLine("y={0}",y);}}}2)Parse/ForclassForDemo{staticvoidMain(string[]args){stringsTemp;intiRow,iColumn;Console.WriteLine("请输入行数:");sTemp=Console.ReadLi

3、ne();iRow=Int32.Parse(sTemp);Console.WriteLine("请输入列数:");sTemp=Console.ReadLine();iColumn=Int32.Parse(sTemp);for(inti=0;i

4、cintdenominator;}classStructDemo{staticvoidMain(string[]args){FractionStx;x.numerator=1;x.denominator=2;FractionSty=x;Console.WriteLine("x={0}/{1}",x.numerator,x.denominator);Console.WriteLine("y={0}/{1}",y.numerator,y.denominator);x.numerator=3;y.denominator=3;Cons

5、ole.WriteLine("x={0}/{1}",x.numerator,x.denominator);Console.WriteLine("y={0}/{1}",y.numerator,y.denominator);}classClassReference{staticvoidMain(string[]args){Fractionx=newFraction();x.numerator=1;x.denominator=2;Fractiony=x;Console.WriteLine("x={0}/{1}",x.numerato

6、r,x.denominator);Console.WriteLine("y={0}/{1}",y.numerator,y.denominator);x.numerator=3;Console.WriteLine("x={0}/{1}",x.numerator,x.denominator);Console.WriteLine("y={0}/{1}",y.numerator,y.denominator);y.denominator=3;Console.WriteLine("x={0}/{1}",x.numerator,x.deno

7、minator);Console.WriteLine("y={0}/{1}",y.numerator,y.denominator);}}classFraction{publicintnumerator;publicintdenominator;}1)异常处理classTryCatch{staticvoidMain(string[]args){stringsTemp;intiCount=0;Console.WriteLine("请输入一个数字:");sTemp=Console.ReadLine();try{iCount=Int3

8、2.Parse(sTemp);for(inti=0;i