assignment problem in c program

Problem Solving Through Programming In C

• Formulate simple algorithms for arithmetic and logical problems
• Translate the algorithms to programs (in C language)
• Test and execute the programs and  correct syntax and logical errors
• Implement conditional branching, iteration and recursion
• Decompose a problem into functions and synthesize a complete program using divide and conquer approach
• Use arrays, pointers and structures to formulate algorithms and programs
• Apply programming to solve matrix addition and multiplication problems and searching and sorting problems 
• Apply programming to solve simple numerical method problems, namely rot finding of function, differentiation of function and simple integration

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• Assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course. 
• ( All assignments in a particular week will be counted towards final scoring - quizzes and programming assignments). 
• Unproctored programming exam score = 25% of the average scores obtained as part of Unproctored programming exam - out of 100
• Proctored Exam score =50% of the proctored certification exam score out of 100

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Solved assignment problems in c – part1.

Q1 . Create a program to compute the volume of a sphere. Use the formula: V = (4/3) *pi*r 3 where pi is equal to 3.1416 approximately. The r is the radius of sphere.  Display the result.

Sol :    #include<stdio.h> #define pi 3.1416 void main() { //we need to give only one input to program i.e., radius of sphere r     int r;   float vol; printf(“Enter radius of sphere:\n”); scanf(“%d”, &r); vol = (4/3)*pi*r*r*r; printf(“Volume of sphere is: %f”, vol); }

Q2 . Write a program the converts the input Celsius degree into its equivalent Fahrenheit degree. Use the formula: F = (9/5) *C+32.

Sol : include<stdio.h> void main() { //need only one input to program i.e., temperature in Celsius float C; float Fh; printf(“Enter temperature in Celsius:\n”); scanf(“%f”, &C); Fh = (1.8*C)+32; printf(“Converted Fahrenheit value is: %f”, Fh); }

Q3 . Write a program that converts the input dollar to its peso exchange rate equivalent.  Assume that the present exchange rate is 51.50 pesos against the dollar. Then display the peso equivalent exchange rate.

Sol: include<stdio.h> void main() { //need only one input to program i.e., Number of Dollars float dollar; float peso; printf(“Enter amount of dollars to convert:\n”); scanf(“%f”, &dollar); peso = dollar*51.50; printf(“Equivalent peso is: %f”, peso); }

Q4 . Write a program that converts an input inch(es) into its equivalent centimeters. Take note that one inch is equivalent to 2.54cms.

Sol : include<stdio.h> void main() { //we need to give only one input to program i.e., inches float inch; float cm; printf(“Enter inches:\n”); scanf(“%f”, &inch);cm = 2.54* inch; printf(“Equivalent peso is: %f”, cm); }

Q5 . Write a program that exchanges the value of two variables: x and y.  The output must be: the value of variable y will become the value of variable x, and vice versa.

Sol : include<stdio.h> void main() { //we need to give 2 inputs: x and y; int x, y; int z; printf(“Enter values of x and y:\n”); scanf(“%d %d”, &x, &y); printf(“Before swapping, values of x and y are: %d %d”, x, y); printf(“\n”);z = x;x = y;y =z; printf(“After swapping, values of x and y are: %d %d”, x, y); }

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Hey Engineers, welcome to the award-winning blog,Engineers Tutor. I'm Gopal Krishna. a professional engineer & blogger from Andhra Pradesh, India. Notes and Video Materials for Engineering in Electronics, Communications and Computer Science subjects are added. "A blog to support Electronics, Electrical communication and computer students".

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• Daniel Weller
• Sharat Chikkerur

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• Electrical Engineering and Computer Science

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Practical programming in c, assignments.

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• C Programming Tutorial
• C - Overview
• C - Features
• C - History
• C - Environment Setup
• C - Program Structure
• C - Hello World
• C - Compilation Process
• C - Comments
• C - Keywords
• C - Identifiers
• C - User Input
• C - Basic Syntax
• C - Data Types
• C - Variables
• C - Integer Promotions
• C - Type Conversion
• C - Booleans
• C - Constants
• C - Literals
• C - Escape sequences
• C - Format Specifiers
• C - Storage Classes
• C - Operators
• C - Arithmetic Operators
• C - Relational Operators
• C - Logical Operators
• C - Bitwise Operators
• C - Assignment Operators
• C - Unary Operators
• C - Increment and Decrement Operators
• C - Ternary Operator
• C - sizeof Operator
• C - Operator Precedence
• C - Misc Operators
• C - Decision Making
• C - if statement
• C - if...else statement
• C - nested if statements
• C - switch statement
• C - nested switch statements
• C - While loop
• C - For loop
• C - Do...while loop
• C - Nested loop
• C - Infinite loop
• C - Break Statement
• C - Continue Statement
• C - goto Statement
• C - Functions
• C - Main Functions
• C - Function call by Value
• C - Function call by reference
• C - Nested Functions
• C - Variadic Functions
• C - User-Defined Functions
• C - Callback Function
• C - Return Statement
• C - Recursion
• C - Scope Rules
• C - Static Variables
• C - Global Variables
• C - Properties of Array
• C - Multi-Dimensional Arrays
• C - Passing Arrays to Function
• C - Return Array from Function
• C - Variable Length Arrays
• C - Pointers
• C - Pointers and Arrays
• C - Applications of Pointers
• C - Pointer Arithmetics
• C - Array of Pointers
• C - Pointer to Pointer
• C - Passing Pointers to Functions
• C - Return Pointer from Functions
• C - Function Pointers
• C - Pointer to an Array
• C - Pointers to Structures
• C - Chain of Pointers
• C - Pointer vs Array
• C - Character Pointers and Functions
• C - NULL Pointer
• C - void Pointer
• C - Dangling Pointers
• C - Dereference Pointer
• C - Near, Far and Huge Pointers
• C - Initialization of Pointer Arrays
• C - Pointers vs. Multi-dimensional Arrays
• C - Strings
• C - Array of Strings
• C - Special Characters
• C - Structures
• C - Structures and Functions
• C - Arrays of Structures
• C - Self-Referential Structures
• C - Nested Structures
• C - Bit Fields
• C - Typedef
• C - Input & Output
• C - File I/O
• C - Preprocessors
• C - Header Files
• C - Type Casting
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• Computer Glossary

Assignment Operators in C

In C language, the assignment operator stores a certain value in an already declared variable. A variable in C can be assigned the value in the form of a literal, another variable, or an expression.

The value to be assigned forms the right-hand operand, whereas the variable to be assigned should be the operand to the left of the " = " symbol, which is defined as a simple assignment operator in C.

In addition, C has several augmented assignment operators.

The following table lists the assignment operators supported by the C language −

Simple Assignment Operator (=)

The = operator is one of the most frequently used operators in C. As per the ANSI C standard, all the variables must be declared in the beginning. Variable declaration after the first processing statement is not allowed.

You can declare a variable to be assigned a value later in the code, or you can initialize it at the time of declaration.

You can use a literal, another variable, or an expression in the assignment statement.

Once a variable of a certain type is declared, it cannot be assigned a value of any other type. In such a case the C compiler reports a type mismatch error.

In C, the expressions that refer to a memory location are called "lvalue" expressions. A lvalue may appear as either the left-hand or right-hand side of an assignment.

On the other hand, the term rvalue refers to a data value that is stored at some address in memory. A rvalue is an expression that cannot have a value assigned to it which means an rvalue may appear on the right-hand side but not on the left-hand side of an assignment.

Variables are lvalues and so they may appear on the left-hand side of an assignment. Numeric literals are rvalues and so they may not be assigned and cannot appear on the left-hand side. Take a look at the following valid and invalid statements −

Augmented Assignment Operators

In addition to the = operator, C allows you to combine arithmetic and bitwise operators with the = symbol to form augmented or compound assignment operator. The augmented operators offer a convenient shortcut for combining arithmetic or bitwise operation with assignment.

For example, the expression "a += b" has the same effect of performing "a + b" first and then assigning the result back to the variable "a".

Run the code and check its output −

Similarly, the expression "a <<= b" has the same effect of performing "a << b" first and then assigning the result back to the variable "a".

Here is a C program that demonstrates the use of assignment operators in C −

When you compile and execute the above program, it will produce the following result −

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Pointer programming exercises and solutions in C

Pointer is a variable that stores memory addresses. Unlike normal variables it does not store user given or processed value, instead it stores valid computer memory address.

Pointer allows various magical things to be performed in C.

• Pointers are more efficient in handling arrays and structures.
• Pointers are used to return multiple values from a function.
• Pointer allows dynamic memory allocation and deallocation (creation and deletion of variables at runtime) in C. Which undoubtedly is the biggest advantage of pointers.
• Pointer allows to refer and pass a function as a parameter to functions.

and many more…

For beginners pointers can be a bad dream if not practiced well. However, once mastered you can do anything you want to do in C programming language.

In this exercise I will cover most of the pointer related topics from a beginner level. Always feel free to drop your queries and suggestion down below in the comments section .

Required knowledge

Pointers , Pointer Arithmetic , Pointer to Pointer , Pointer and Arrays , Function Pointer

Please go through above tutorials to get a good grasp of following examples.

List of pointer programming exercises

• Write a C program to create, initialize and use pointers .
• Write a C program to add two numbers using pointers .
• Write a C program to swap two numbers using pointers .
• Write a C program to input and print array elements using pointer .
• Write a C program to copy one array to another using pointers .
• Write a C program to swap two arrays using pointers .
• Write a C program to reverse an array using pointers .
• Write a C program to search an element in array using pointers .
• Write a C program to access two dimensional array using pointers .
• Write a C program to add two matrix using pointers .
• Write a C program to multiply two matrix using pointers .
• Write a C program to find length of string using pointers .
• Write a C program to copy one string to another using pointers .
• Write a C program to concatenate two strings using pointers .
• Write a C program to compare two strings using pointers .
• Write a C program to find reverse of a string using pointers .
• Write a C program to sort array using pointers .
• Write a C program to return multiple value from function using pointers .

Learn C practically and Get Certified .

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Popular examples, reference materials, learn c interactively, c introduction.

• Getting Started with C
• Your First C Program

C Fundamentals

• C Variables, Constants and Literals
• C Data Types
• C Input Output (I/O)
• C Programming Operators

C Flow Control

• C if...else Statement
• C while and do...while Loop
• C break and continue
• C switch Statement
• C goto Statement
• C Functions
• C User-defined functions
• Types of User-defined Functions in C Programming
• C Recursion
• C Storage Class

C Programming Arrays

C Multidimensional Arrays

Pass arrays to a function in C

C Programming Pointers

Relationship Between Arrays and Pointers

• C Pass Addresses and Pointers
• C Dynamic Memory Allocation
• C Array and Pointer Examples
• C Programming Strings
• String Manipulations In C Programming Using Library Functions
• String Examples in C Programming

C Structure and Union

• C structs and Pointers
• C Structure and Function

C Programming Files

• C File Handling

C Files Examples

C Additional Topics

• C Keywords and Identifiers
• C Precedence And Associativity Of Operators
• C Bitwise Operators
• C Preprocessor and Macros
• C Standard Library Functions

C Tutorials

• Find Largest Element in an Array
• Calculate Average Using Arrays
• Access Array Elements Using Pointer
• Add Two Matrices Using Multi-dimensional Arrays

An array is a variable that can store multiple values. For example, if you want to store 100 integers, you can create an array for it.

How to declare an array?

For example,

Here, we declared an array, mark , of floating-point type. And its size is 5. Meaning, it can hold 5 floating-point values.

It's important to note that the size and type of an array cannot be changed once it is declared.

Access Array Elements

You can access elements of an array by indices.

Suppose you declared an array mark as above. The first element is mark[0] , the second element is mark[1] and so on.

Few keynotes :

• Arrays have 0 as the first index, not 1. In this example, mark[0] is the first element.
• If the size of an array is n , to access the last element, the n-1 index is used. In this example, mark[4]
• Suppose the starting address of mark[0] is 2120d . Then, the address of the mark[1] will be 2124d . Similarly, the address of mark[2] will be 2128d and so on. This is because the size of a float is 4 bytes.

How to initialize an array?

It is possible to initialize an array during declaration. For example,

You can also initialize an array like this.

Here, we haven't specified the size. However, the compiler knows its size is 5 as we are initializing it with 5 elements.

Change Value of Array elements

Input and output array elements.

Here's how you can take input from the user and store it in an array element.

Here's how you can print an individual element of an array.

Example 1: Array Input/Output

Here, we have used a  for loop to take 5 inputs from the user and store them in an array. Then, using another  for loop, these elements are displayed on the screen.

Example 2: Calculate Average

Here, we have computed the average of n numbers entered by the user.

Access elements out of its bound!

Suppose you declared an array of 10 elements. Let's say,

You can access the array elements from testArray[0] to testArray[9] .

Now let's say if you try to access testArray[12] . The element is not available. This may cause unexpected output (undefined behavior). Sometimes you might get an error and some other time your program may run correctly.

Hence, you should never access elements of an array outside of its bound.

Multidimensional arrays

In this tutorial, you learned about arrays. These arrays are called one-dimensional arrays.

In the next tutorial, you will learn about multidimensional arrays (array of an array) .

Table of Contents

• C Arrays (Introduction)
• Declaring an Array
• Access array elements
• Initializing an array
• Change Value of Array Elements
• Array Input/Output
• Example: Calculate Average
• Array Elements Out of its Bound

Video: C Arrays

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