This function is defined in <cmath.h> . By using isnormal() function, we determines that whether the given number is normal (neither zero, infinite nor NAN) or not. This function returns 1 if the number is normal else return zero.
Syntax:
bool isnormal(float x);
or
bool isnormal(double x);
or
bool isnormal(long double x);
Parameters: This functions takes a mandatory parameter x which represents the floating point value.
Returns: If the given value is normal then the function returns 1 otherwise the function returns zero.
Below program illustrate the isnormal() function in C++:
Example 1:- To show with float value
// c++ program to demonstrate // example of isnormal() function. #include <bits/stdc++.h> using namespace std; int main() { float f = 7.0F; // check for non-zero value cout << "isnormal(7.0) is = " << isnormal(f) << endl; // check for zero f = 0.0F; cout << "isnormal(0.0) is = " << isnormal(f) << endl; // check for infinite value f = 9.2F; cout << "isnormal(9.2/0.0) is = " << isnormal(f / 0.0) << endl; return 0; } |
isnormal(7.0) is = 1 isnormal(0.0) is = 0 isnormal(9.2/0.0) is = 0
Example 2:- To show with double value
// c++ program to demonstrate // example of isnormal() function. #include <bits/stdc++.h> using namespace std; int main() { double f = 7.0; // check for non-zero value cout << "isnormal(7.0) is = " << isnormal(f) << endl; // check for zero f = 0.0; cout << "isnormal(0.0) is = " << isnormal(f) << endl; // check for infinite value f = 9.2; cout << "isnormal(9.2/0.0) is = " << isnormal(f / 0.0) << endl; return 0; } |
isnormal(7.0) is = 1 isnormal(0.0) is = 0 isnormal(9.2/0.0) is = 0
Example 3:- To show with long double value
// c++ program to demonstrate // example of isnormal() function. #include <bits/stdc++.h> using namespace std; int main() { long double f = 7.0; // check for non-zero value cout << "isnormal(7.0) is = " << isnormal(f) << endl; // check for zero f = 0.0; cout << "isnormal(0.0) is = " << isnormal(f) << endl; // check for infinite value f = 9.2; cout << "isnormal(9.2/0.0) is = " << isnormal(f / 0.0) << endl; return 0; } |
isnormal(7.0) is = 1 isnormal(0.0) is = 0 isnormal(9.2/0.0) is = 0
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