C Exercises: Convert a string to a double
C Variable Type : Exercise-14 with Solution
Write a C program to convert a string to a double.
Sample Solution:
C Code:
#include<stdio.h> // Include the standard input/output header file.
#include<stdlib.h> // Include the standard library header file.
int main () // Start of the main function.
{
double num1, num2; // Declare two double variables 'num1' and 'num2'.
char my_array[256]; // Declare a character array 'my_array' with a maximum size of 256.
printf ( "\n Input a number : " ); // Prompt the user to input a number.
fgets (my_array, 256, stdin); // Read a line of input from the user and store it in 'my_array'.
num1 = atof (my_array); // Convert the string in 'my_array' to a double and store it in 'num1'.
num2 = num1/2; // Calculate half of 'num1' and store it in 'num2'.
printf (" The original number is : %f \n", num1); // Print the original value of 'num1'.
printf (" After division by 2 the number is : %f\n\n", num2); // Print the value of 'num2' after division by 2.
return 0; // Return 0 to indicate successful execution of the program.
} // End of the main function.
Sample Output:
Input a number : 25 The original number is : 25.000000 After division by 2 the number is : 12.500000
Flowchart:

C Programming Code Editor:
Previous: Write a C program to convert a string to an integer.
Next: Write a C program to set a function that will be executed on termination of a program.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join