C fmod() function
C fmod() function - Calculate Floating-Point remainder
Syntax:
double fmod(double x, double y)
The fmod() function is used to calculate the floating-point remainder of x/y. The absolute value of the result is always less than the absolute value of y and the result will have the same sign as x.
Parameters:
Name | Description | Required /Optional |
---|---|---|
x | Floating-point value. | Required |
y | Floating-point value. | Required |
Return value from fmod()
- Returns the floating-point remainder of x/y.
- If y is zero or if x/y causes an overflow, fmod() returns 0.
Example: fmod() function
The following example shows the usage of fmod() function.
#include <math.h>
#include <stdio.h>
int main(void)
{
double x, y, result;
x = 200.0;
y = 7.0;
printf("Before applying fmod()");
printf("\nx = %lf", x);
printf("\ny = %lf", y);
result = fmod(x,y);
printf("\n\nAfter applying fmod()");
printf("\nResult = %lf", result);
x = -45.0;
y = 4.0;
printf("\n\nBefore applying fmod()");
printf("\nx = %lf", x);
printf("\ny = %lf", y);
result = fmod(x,y);
printf("\n\nAfter applying fmod()");
printf("\nResult = %lf", result);
}
Output:
Before applying fmod() x = 200.000000 y = 7.000000 After applying fmod() Result = 4.000000 Before applying fmod() x = -45.000000 y = 4.000000 After applying fmod() Result = -1.000000
C Programming Code Editor:
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C Programming: Tips of the Day
What's the point of const pointers?
const is a tool which you should use in pursuit of a very important C++ concept:
Find bugs at compile-time, rather than run-time, by getting the compiler to enforce what you mean.
Even though it does not change the functionality, adding const generates a compiler error when you're doing things you didn't mean to do. Imagine the following typo:
void foo(int* ptr) { ptr = 0;// oops, I meant *ptr = 0 }
If you use int* const, this would generate a compiler error because you're changing the value to ptr. Adding restrictions via syntax is a good thing in general. Just don't take it too far -- the example you gave is a case where most people don't bother using const.
Ref : https://bit.ly/33Cdn3Q
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