C # Basics Exercises

(a) Circulation

1. Print out 5 "Hello world!"

            /// /output of 5 "Hello world!"            for (int i = 0; i < 5; i++)             {                Console.WriteLine ("Hello world!");             }

2, an integer that prints out 1-100.

             The integer for the PrintOut 1-100 for           (int i = 1; i < 101; i++)            {                if (i%10==0)                {                    Console.WriteLine (i);                }            }

3. The odd number in print output 1-100

    // the odd            number in print output 1-100  for (int1101; i++)            {                if (i%2! =0)              {                   Console.WriteLine (i);              }            }

4. The number that can be divisible by 3 in print output 1-100

          // number that can be divisible by 3 in print output 1-100            for (int1101; i++)             {               if (i%3= =0)               {                    Console.WriteLine (i);               }           }

5.

          ///5. Calculate the sum of 1-100 integers            intsum=0;  for(inti =1; I <101; i++) {sum+=i; } Console.WriteLine ("The sum of integers is {0}", sum); ///6 Enter 5 integers from the keyboard, add the 5 integers in the input (the first method)          intnum, sum =0, Count =0;  Do{Console.Write ("Enter Number:"); Num=int.                Parse (Console.ReadLine ()); Count++; Sum+=num; }  while(Count <5); Console.WriteLine ("and for"+sum); ///7 Calculating the sum of the even numbers in 1-100            intsum =0;  for(inti =1; I <101; i++)            {                               ifI2==0) {sum+=i; }} Console.WriteLine ("The sum of the even numbers is {0}", sum); /*8 Write a program to print all the daffodils. The so-called Narcissus number, refers to a three-bit integer, the number of its members of the cubic and equal to the number itself, for example: 153 = 1*1*1 + 5*5*5 + 3*3*3*/        /*9 Enter a number less than 5 digits, judging by the number of digits, and reverse output, such as: 123, output--and input is 3 digits, the reverse output of the result is 321. */Console.Write ("Please enter:"); intnum =int.            Parse (Console.ReadLine ()); //Judging is a number of digits            if(Num <10000)            {                if(Num >999) Console.WriteLine ("{0} is a 4-digit number", num); Else if(Num > About) Console.WriteLine ("{0} is a 3-digit number", num); Else if(Num >9) Console.WriteLine ("{0} is a 2-digit number", num); Else if(Num >0) Console.WriteLine ("{0} is a 1-digit number", num); }            ElseConsole.WriteLine ("Please enter the number to be less than 5 bits, please reenter"); //Invert output          Char[] arr =Num. ToString ().            ToCharArray ();            Array.reverse (arr); foreach(varItemincharr)            {Console.Write (item);          } Console.WriteLine (); ///10,hundred money to buy white chicken.         //A is a hen, B is a rooster, and C is a chicken.              for(intA =1; A <= -; a++)            {                 for(intb =1; b <= -; b++)                {                    for(intc =1; c<= -; C++)                    {                        if(a+b+c== -&& A *5+b*3+c*1/3== -&& c%3==0) {Console.WriteLine ("The hen is {0} only, the rooster is {1} only, the chick is {2} only", A,b,c); }                    }               }           }

Friends in the atom, feel the problem, please point out, we learn from each other and progress together!

C # Basics Exercises