The fdim()
function in C is a standard library function that computes the positive difference between two floating-point numbers. It is part of the C standard library (math.h
). This function is useful for performing mathematical operations where the non-negative difference between two values is required.
Table of Contents
- Introduction
fdim()
Function Syntax- Understanding
fdim()
Function - Examples
- Computing the Positive Difference
- Using
fdim()
with User Input
- Real-World Use Case
- Conclusion
Introduction
The fdim()
function calculates the positive difference between two given floating-point numbers ( x ) and ( y ). The positive difference is defined as ( x - y ) if ( x > y ); otherwise, it is 0.
fdim() Function Syntax
The syntax for the fdim()
function is as follows:
#include <math.h>
double fdim(double x, double y);
Parameters:
x
: The first floating-point value.y
: The second floating-point value.
Returns:
- The function returns the positive difference between
x
andy
, which is ( x - y ) if ( x > y ); otherwise, it returns 0.
Understanding fdim() Function
The fdim()
function takes two floating-point numbers ( x ) and ( y ) and returns the positive difference between them. If ( x ) is greater than ( y ), the function returns ( x - y ); otherwise, it returns 0. This function ensures that the result is always non-negative.
Examples
Computing the Positive Difference
To demonstrate how to use fdim()
to compute the positive difference between two values, we will write a simple program.
Example
#include <stdio.h>
#include <math.h>
int main() {
double x = 5.7;
double y = 3.2;
// Compute the positive difference
double result = fdim(x, y);
// Print the result
printf("Positive difference between %.2f and %.2f is: %.2f\n", x, y, result);
return 0;
}
Output:
Positive difference between 5.70 and 3.20 is: 2.50
Using fdim()
with User Input
This example shows how to use fdim()
to compute the positive difference between two values provided by the user.
Example
#include <stdio.h>
#include <math.h>
int main() {
double x, y;
// Get user input for the values
printf("Enter the value for x: ");
scanf("%lf", &x);
printf("Enter the value for y: ");
scanf("%lf", &y);
// Compute the positive difference
double result = fdim(x, y);
// Print the result
printf("Positive difference between %.2f and %.2f is: %.2f\n", x, y, result);
return 0;
}
Output (example user input x "2.5" and y "3.8"):
Enter the value for x: 2.5
Enter the value for y: 3.8
Positive difference between 2.50 and 3.80 is: 0.00
Real-World Use Case
Calculating Positive Changes in Financial Applications
In real-world applications, the fdim()
function can be used to calculate positive changes in financial applications, such as determining the profit when comparing two financial values.
Example: Calculating Profit
#include <stdio.h>
#include <math.h>
int main() {
double selling_price, cost_price;
double profit;
// Get user input for the selling price and cost price
printf("Enter the selling price: ");
scanf("%lf", &selling_price);
printf("Enter the cost price: ");
scanf("%lf", &cost_price);
// Calculate the profit
profit = fdim(selling_price, cost_price);
// Print the result
printf("The profit is: %.2f\n", profit);
return 0;
}
Output (example user input selling_price "150.0" and cost_price "100.0"):
Enter the selling price: 150.0
Enter the cost price: 100.0
The profit is: 50.00
Conclusion
The fdim()
function is essential for computing the positive difference between two floating-point numbers in C. It is useful in various mathematical calculations, particularly in fields like finance, engineering, and scientific research, where ensuring non-negative differences is important.
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