region for语句

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1、#regionfor语句publicclassC3{#region表达式求值//计算奇数之和，偶数之积publicstaticvoidSun7(){//两个for循环intsum1=0;intdbResult1=1;for(inti=1;i<=10;i+=2){sum1+=i;}for(intj=2;j<=10;j+=2){dbResult1*=j;}Console.WriteLine("双for循环，奇数之和"+sum1+"偶数之积"+dbResult1);//单for循环intsum2=0;intdbResult2=

2、1;for(intx=1;x<=10;x++){if(x%2==1){sum2+=x;}else{dbResult2*=x;}}Console.WriteLine("单for循环，奇数之和"+sum2+"偶数之积"+dbResult2);//While循环//while循环做1--100之内的偶数之积和奇数之和intm=1;//定义循环变量doubledbSult=1;intsum=0;while(m<=10){if(m%2==0){dbSult*=m;}else{sum=sum+m;}m++;}Console.Writ

3、eLine("while循环，奇数之和：{0}偶数之积：{1}",sum,dbSult);}//1!+2!+3!+4!+…+10!publicstaticvoidSun8(){doubledbnum=1;doubledbsum=0;for(inti=1;i<=10;i++){dbnum*=i;dbsum+=dbnum;//一个循环两件事情了；累积到dbsum上}Console.WriteLine("结果为："+dbsum);}//S=1-1/2+1/3-1/4+1/5+……+1/99的值。publicstaticvoid

4、Sun9(){//拆分开计算doubleeven=0;doubleodd=0;for(inti=1;i<=99;i++){if(i%2==0){even=even-1.0/i;}}for(intj=0;j<=99;j++){if(j%2==1){odd=odd+1.0/j;}}Console.WriteLine("双For循环的结果为："+(even+odd));doubledbsum=0;for(intk=1;k<=99;k++){//偶数就有减法if(k%2==0){dbsum=dbsum-1.0/k;}else{d

5、bsum=dbsum+1.0/k;}}Console.WriteLine("单For循环的结果为："+dbsum);}#endregion//打印乘法表1publicstaticvoidFun1(){//打印表头Console.WriteLine("九九乘法表");//打印九九表for(inti=1;i<=15;i++){//计算并格式化输出九九表的内容for(intj=1;j<=i;j++){Console.Write("{0}x{1}={2}t",i,j,i*j);}//换行Console.WriteLine();

6、}}//打印乘法表2publicstaticvoidFun1_1(){for(inti=1;i<=9;i++){//i控制行for(intj=1;j<=i;j++){//j控制列i和j的关系是在每行中j<=iConsole.Write("{0}*{1}={2}",j,i,i*j);//若拼接字符串使用//str+=j+"x"+i+"="+i*j+"";}Console.WriteLine();}}//输出直角三角形。publicstaticvoidFun2(){for(inti=1;i<=9;i++){for(intj=

7、1;j<=i;j++){Console.Write("*");}Console.WriteLine();}}//输出菱形。publicstaticvoidFun3(){for(inti=1;i<=4;i++){for(intj=1;j<=4-i;j++){Console.Write("");}for(intk=1;k<=2*i-1;k++){Console.Write("*");}Console.WriteLine();}for(inta=1;a<=4;a++){for(intg=1;g<=a;g++){Console.

8、Write("");}for(intf=1;f<=(6-2*a)+1;f++){Console.Write("*");}Console.WriteLine();}}//输出等腰三角形publicstaticvoidFun4(){for(inti=1;i<=4;i++){for(intj=1;j<=4-i;j++){C