6, C # Basic finishing (For statement classic exercise--for loop nesting, exhaustive)

1, for loop nesting----The most basic problem: to find factorial and

 intsum =0; intn =int. Parse (Console.ReadLine ());  for(inti =0; I < n; i++) {      intSUM1 =1;//define the variable sum1, each time the loop is given its initial value of 1, to find the factorial dedicated       for(intj =1; J <= i+1; J + +) {sum1= Sum1 *J; } Sum= sum + sum1;//Add and add each factorial} Console.WriteLine (sum);

2. For the poor lifting of the loop

Example: 100 yuan buy 2 yuan of pencils, 5 yuan pencil case, 10 Yuan folder, 15 yuan of color pens, just spend light, each kind of goods must have one, altogether how many kinds of possibility?

intCount =0; for(intQB =1;qb< -; qb++){      for(inthe =1; He < -; he++)     {             for(intJia =1; Jia <Ten; jia++)            {                  for(intCai =1; Cai <7; cai++ )                 {                      if(QB *2+ He *5+ jia*Ten+cai* the== -) {Count++; Console.WriteLine ("pencil: {0}, pencil case: {1}, folder: {2}, Color pen: {3}", QB, HE,JIA,CAI);    }}}}}console.writeline (count); 

3. Print a diamond with a nested for loop :

1Console.WriteLine ("Please enter the length of the side:");2             intII =int. Parse (Console.ReadLine ());3Console.WriteLine ("the printed diamond is:");4             //Print the triangle above5              for(intg =0; G < II; g++)6             {7                 8                  for(intn = ii-g; n >1; n--)9                 {TenConsole.Write ("  "); One                 } A                  for(intm =1; M <= G; m++) -                 { -Console.Write (" #"); the                 } -                 -                  for(intp =1; P <= G; p++) -                 { +Console.Write (" #"); -                 } +Console.WriteLine (" #"); A             } at             //Print the following triangle -              for(intj =0; J < II-1; J + +) -             { -                  for(intA =1; A <= J +1; a++) -                 { -Console.Write ("  "); in                 } -                  for(intb = ii-j; B >2; b--) to                 { +Console.Write (" #"); -                 } the                  for(intc = ii-j; C >2; c--) *                 { $Console.Write (" #");Panax Notoginseng                 } -Console.WriteLine (" #"); the}

6, C # Basic finishing (For statement classic exercise--for loop nesting, exhaustive)