C Programming Exercises, Practice, Solution : Function

C Function [12 exercises with solution]

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1. Write a program in C to show the simple structure of a function.
Expected Output :

The total is :  11  

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2. Write a program in C to find the square of any number using the function.
Test Data :
Input any number for square : 20
Expected Output :

The square of 20 is : 400.00

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3. Write a program in C to swap two numbers using a function.
Test Data :
Input 1st number : 2
Input 2nd number : 4
Expected Output :

Before swapping: n1 = 2, n2 = 4                                                  
After swapping: n1 = 4, n2 = 2 

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4. Write a program in C to check if a given number is even or odd using the function.
Test Data :
Input any number : 5
Expected Output :

 The entered number is odd.  

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5. Write a program in C to find the sum of the series 1!/1+2!/2+3!/3+4!/4+5!/5 using the function.
Expected Output :

 The sum of the series is : 34 

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6. Write a program in C to convert a decimal number to a binary number using the function.
Test Data :
Input any decimal number : 65
Expected Output :

 The Binary value is : 1000001 
 

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7. Write a program in C to check whether a number is a prime number or not using the function.
Test Data :
Input a positive number : 5
Expected Output :

The number 5 is a prime number. 

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8. Write a program in C to get the largest element of an array using the function.
Test Data :
Input the number of elements to be stored in the array :5
Input 5 elements in the array :
element - 0 : 1
element - 1 : 2
element - 2 : 3
element - 3 : 4
element - 4 : 5
Expected Output :

The largest element in the array is : 5   

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9. Write a program in C to check Armstrong and Perfect numbers using the function.
Test Data :
Input any number: 371
Expected Output :

 The 371 is an Armstrong number.                                                 
 The 371 is not a Perfect number.  

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10. Write a program in C to print all perfect numbers in a given range using the function.
Test Data :
Input lowest search limit of perfect numbers : 1
Input lowest search limit of perfect numbers : 100
Expected Output :

 The perfect numbers between 1 to 100 are :                                      
 6   28  
 

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11. Write a program in C to check whether two given strings are an anagram.
Test Data :
Input the first String : spare
Input the second String : pears
Expected Output :

 spare and pears are Anagram.    

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12. Write a C program to find the maximum and minimum of some values using a function that returns an array.
Test Data :
Input 5 values
25
11
35
65
20
Expected Output :

Number of values you want to input: Input 5 values
Minimum value is: 11
Maximum value is: 65  

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