Let Us C Chapter 7 and 8 Problems

Note-Please Attempt problem from your own first.Otherwise click on the link question to get the solution.

Chapter 7 problem 7[C][a]

Write down macro definitions for the following: 1.  To test whether a character entered is a small case letter or not. 2.  To test whether a character entered is a upper case letter or not. 3.  To test whether a character is an alphabet or not. Make use of the macros you defined in (1) and (2) above. 4.  To obtain the bigger of two numbers. 

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chapter 7 problem [C][b]

Write macro definitions with arguments for calculation of area and perimeter of a triangle, a square and a circle. Store these macro definitions in a file called “areaperi.h”. Include this file in your program, and call the macro definitions for calculating area and perimeter for different squares, triangles and circles. 

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chapter 7 Problem [C][c]

Write down macro definitions for the following: 1.  To find arithmetic mean of two numbers. 2.  To find absolute value of a number. 3.  To convert a uppercase alphabet to lowercase. 4.  To obtain the bigger of two numbers. 

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chapter 7  Problem [C][d]

Write macro definitions with arguments for calculation of Simple Interest and Amount. Store these macro definitions in a file called “interest.h”. Include this file in your program, and use the macro definitions for calculating simple interest and amount. 

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Chapter 8  Problem [D][a]

Twenty-five numbers are entered from the keyboard into an array. The number to be searched is entered through the keyboard by the user. Write a program to find if the number to be searched is present in the array and if it is present, display the number of times it appears in the array. 

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Chapter 8 Problem [D][b]

Twenty-five numbers are entered from the keyboard into anarray.Write a program to find out how many of the are positive, how many are negative, how many are even and how many odd.

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Chapter 8 Problem 8[C][c]-Part 1

Implement the Selection Sort, Bubble Sort and Insertion sort algorithms on a set of 25 numbers. (Refer Figure 8.11 for the logic of the algorithms) −  Selection sort 

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Chapter 8  Problem [C][c]-Part 2

Implement the Selection Sort, Bubble Sort and Insertion sortalgorithms on a set of 25 numbers. (Refer Figure 8.11 for the logic of the algorithms) −  Bubble Sort

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Chapter 8 Problem [C][c]-Part 3

 Implement the Selection Sort, Bubble Sort and Insertion sortalgorithms on a set of 25 numbers. (Refer Figure 8.11 for the logic of the algorithms) −  Insertion Sort

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chapter 8  Problem [D][d]

Implement the following procedure to generate prime numbers from 1 to 100 into a program. This procedure is called sieve of Eratosthenes. step 1  Fill an array num[100]with numbers from 1 to 100 step 2  Starting with the second entry in the array, set all its multiples to zero. step 3  Proceed to the next non-zero element and set all its multiples to zero. step 4  Repeat step 3 till you have set up the multiples of all the non-zero elements to zero step 5  At the conclusion of step 4, all the non-zero entries left in the array would be prime numbers, so print out these numbers. 

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Chapter 8 Problem [I][a]

Write a program to copy the contents of one array into another in the reverse order.

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Chapter 8 Problem [I][b]

If an array arr contains n elements, then write a program to check if arr[0] = arr[n-1], arr[1] = arr[n-2]and so on. 

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Chapter 8 Problem [I][c]

Find the smallest number in an array using pointers.

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Chapter 8 Problem [I][d]

Write a program which performs the following tasks: −  initialize an integer array of 10 elements in main( )−  pass the entire array to a function modify( )−  in modify( )multiply each element of array by 3 −  return the control to main( )and print the new array elements in main( )

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Chapter 8 Problem [I][e]

The screen is divided into 25 rows and 80 columns. The characters that are displayed on the screen are stored in a special memory called VDU memory (not to be confused with ordinary memory). Each character displayed on the screen occupies two bytes in VDU memory. The first of these bytes contains the ASCII value of the character being displayed, whereas, the second byte contains the colour in which the character is displayed. For example, the ASCII value of the character present on zeroth row and zeroth column on the screen is stored at location number 0xB8000000. Therefore the colour of this character would be present at location number 0xB8000000 + 1. Similarly ASCII value of character in row 0, col 1 will be at location 0xB8000000 + 2, and its colour at 0xB8000000 + 3. With this knowledge write a program which when executed would keep converting every capital letter on the screen to small case letter and every small case letter to capital letter. The procedure should stop the moment the user hits a key from the keyboard. This is an activity of a rampant Virus called Dancing Dolls. (For monochrome adapter, use 0xB0000000 instead of 0xB8000000). 

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Chapter 8 Problem [L][a]

How will you initialize a three-dimensional array threed[3][2][3]? How will you refer the first and last element in this array? 

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Chapter 8  Problem [L][b]

Write a program to pick up the largest number from any 5 row by 5 column matrix. 

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Chapter 8  Problem [L][c]

Write a program to obtain transpose of a 4 x 4 matrix. The transpose of a matrix is obtained by exchanging the elements of each row with the elements of the corresponding column

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Chapter 8 Problem [L][e]- Part 1

Those readers who are from an Engineering/Science background may try writing programs for following problems. (1)  Write a program to add two 6 x 6 matrices.

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Chapter 8 Problem [L][e]- Part 2

Write a program to multiply any two 3 x 3 matrices.

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Chapter 8 Solution Problem [L][e]- Part 3

Write a program to sort all the elements of a 4 x 4 matrix.


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