In C++, isgreater() is a predefined function used for mathematical calculations. math.h is the header file required for various mathematical functions.
isgreater() function used to check whether the 1st argument given to the function is greater than the 2nd argument given to the function or not. Means if a is the 1st argument and b is the 2nd argument then it check whether a>b or not.
Syntax:
bool isgreater(a, b)
Parameters:
a, b => These two are the parameters whose value we want to compare.
Result:
The function will return the true if a>b else it returns false.
Error:
No error occurs with this function.
Exception:
If a or b or both is NaN,
then the function raised an exception and return false(0).
Time Complexity: O(1)
Auxiliary Space: O(1)
CPP
#include <bits/stdc++.h>
using namespace std;
int main()
{
int a = 5;
double f1 = nan( "1" );
bool result;
result = isgreater(f1, a);
cout << f1 << " isgreater than " << a
<< ": " << result;
return 0;
}
|
Output:
nan isgreater than 5: 0
CPP
#include <bits/stdc++.h>
using namespace std;
int main()
{
int a, b;
bool result;
a = 5;
b = 8;
result = isgreater(a, b);
cout << a << " isgreater than " << b
<< ": " << result << endl;
char x = 'd' ;
result = isgreater(x, b);
cout << x << " isgreater than " << b
<< ": " << result;
return 0;
}
|
5 isgreater than 8: 0
d isgreater than 8: 1
-
- This function can be used in any comparison based sorting algorithm. Let’s use it in bubble sort:
CPP
#include <bits/stdc++.h>
using namespace std;
int main()
{
int arr[] = { 5, 2, 8, 3, 4 };
int n = sizeof (arr) / sizeof (arr[0]);
for ( int i = 0; i < n - 1; i++)
{
for ( int j = 0; j < n - i - 1; j++)
{
if (isgreater(arr[j], arr[j + 1]))
{
int k = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = k;
}
}
}
cout << "Sorted array: " ;
for ( int i = 0; i < n; i++) {
cout << arr[i] << ", " ;
}
return 0;
}
|
Sorted array: 2, 3, 4, 5, 8,
Last Updated :
14 Mar, 2023
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...