Array Basic Programming Questions

Question 1:  Program to print sum of array

Code Snippet:

1. using System;  
2. public class SumArray  
3. {  
4.     public static void Main()  
5.     {  
6.         int[] array = {87,85,98,25,45,63,45,86,36,52};  
7.         int total = 0;  
8.   
9.         for(int counter = 0; counter<array.Length; counter++)  
10.         {  
11.             total += array[counter];  
12.         }  
13.   
14.         Console.WriteLine("Total of array = {0}", total);  
15.     }     
16. }

Fig: Screenshot of Output

Question 2: Program to print BarChart.

Code Snippet:

1. using System;    
2. public class BarChart    
3. {    
4.     public static void Main()    
5.     {    
6.         int[] array = {0,1,1,2,0,0,0,1,4,10,5};    
7.     
8.         Console.WriteLine("Grade Distribution");    
9.     
10.         for(int counter = 0; counter<array.Length; counter++)    
11.         {    
12.             if(counter == 10)    
13.             {    
14.                 Console.Write( "100  :" );    
15.             }    
16.             else    
17.             {    
18.                 Console.Write("{0:D2}-{1:D2}:", counter*10, counter*10+9);    
19.             }    
20.     
21.             for(int stars = 0; stars<array[counter]; stars++)    
22.                 Console.Write( "*" );    
23.     
24.             Console.WriteLine();    
25.         }    
26.     }    
27. }

Fig: Screenshot of output

Question 3: Program to Count Frequency of a rolling die 6000 times.

Code Snippet:

1. using System;  
2. class RollDie  
3. {  
4.     public static void Main()  
5.     {  
6.         Random randomNumbers = new Random();  
7.         int[] frequency = new int[7];  
8.   
9.         for(int roll = 1; roll<=6000; roll++)  
10.         ++frequency[randomNumbers.Next(1,7)];  
11.   
12.         Console.WriteLine("{0}{1,15}","Face", "Frequency");  
13.   
14.         for(int face=1; face<frequency.Length; face++)  
15.         Console.WriteLine("{0,3}{1,13}", face, frequency[face]);  
16.   
17.         Console.ReadLine();  
18.     }  
19. }  

Fig: Screenshot of output

Question 4: Forty Student were asked to rate the quality of the food in the cafeteria on a scale 1 to 10 (where 1 means awful and 10 means excellent). Place the 40 response response in the integer array and summarize the result of poll.

Code Snippet:

1. using System;  
2. class RollDie  
3. {  
4.     public static void Main()  
5.     {  
6.         Random randomNumbers = new Random();  
7.         int[] frequency = new int[7];  
8.   
9.         for(int roll = 1; roll<=6000; roll++)  
10.         ++frequency[randomNumbers.Next(1,7)];  
11.   
12.         Console.WriteLine("{0}{1,15}","Face", "Frequency");  
13.   
14.         for(int face=1; face<frequency.Length; face++)  
15.         Console.WriteLine("{0,3}{1,13}", face, frequency[face]);  
16.   
17.         Console.ReadLine();  
18.     }  
19. }  

Fig: Screenshot of output

Question 5: Program to calculate sum of array using for each loop.

Code Snippet:

1. using System;  
2. public class ForEach  
3. {  
4.     public static void Main()  
5.     {  
6.         int[] array = {2,1,45,78,56,4,2,6,7,8,4,2};  
7.   
8.         int total = 0;  
9.   
10.         foreach(int i in array)  
11.         total += i;  
12.   
13.         foreach(int number in array)  
14.         Console.Write("{0} ", number);  
15.   
16.         Console.WriteLine();  
17.   
18.         Console.WriteLine("Sum of array= {0}", total);  
19.   
20.         Console.ReadLine();  
21.     }  
22. }  

Fig: Screenshot of output

Question 6: Program to initializing jagged array.

Code Snippet:

1. using System;  
2. public class InitArray  
3. {  
4.     public static void Main()  
5.     {  
6.         int[,] rectangular = {{1,2,3},{4,5,6}};  
7.   
8.         int[][] jagged = {  new int[] {1,2},  
9.                     new int[] {3},  
10.                     new int[] {4,5,6}   };  
11.   
12.         OutputArray( rectangular );  
13.         Console.WriteLine();  
14.         OutputArray( jagged );  
15.   
16.         Console.ReadLine();  
17.     }  
18.   
19.     public static void OutputArray(int[,] array)  
20.     {  
21.         Console.WriteLine("Value of the rectangular array by row are");  
22.   
23.         for(int row = 0; row<array.GetLength(0); row++)  
24.         {  
25.             for(int column = 0; column<array.GetLength(1); column++)  
26.                 Console.Write("{0} ", array[row,column]);  
27.                 Console.WriteLine();  
28.         }  
29.     }  
30.   
31.     public static void OutputArray(int[][] array)  
32.     {  
33.         Console.WriteLine("Value of jagged array by row are: ");  
34.   
35.         for(int row = 0; row < array.Length; row++)  
36.         {  
37.             for(int column = 0; column < array[row].Length; column++)  
38.                 Console.Write("{0} ",array[row][column]);  
39.   
40.             Console.WriteLine();  
41.         }  
42.     }  
43. }  

Fig: Screenshot of output