fdim() in C++

The fdim() function takes two arguments and returns the positive difference between first and second argument.

This function returns a-b if a>b otherwise returns 0. where, a is the first argument and b
is the second argument.

Syntax:

```double fdim(double a, double b);
float fdim(float a, float b);
```

Parameter:

```The fdim() function takes two arguments a and b, where,  a is the first argument and b
is the second argument.
```

Return:

```This function returns a-b if a>b otherwise returns 0.
```

Error:

```It is mandatory to give both the arguments otherwise it will give error
no matching function for call to 'fdim()' like this.
```

Examples:

```Inuput : fdim(2.0, 1.0)
Output : 1

Inuput : fdim(-2.0, 1.0)
Output : 0
```

# CODE 1

 `#include ` `#include ` `using` `namespace` `std; ` ` `  `int` `main() ` `{ ` `    ``// positive difference for 2.0 and 1.0 is 1 ` `    ``cout << ``"fdim of (2.0, 1.0) is "` `<< fdim(2.0, 1.0) << endl; ` ` `  `    ``// here 1.0<2.0 so the output is 0 ` `    ``cout << ``"fdim of (1.0, 2.0) is "` `<< fdim(1.0, 2.0) << endl; ` ` `  `    ``// here -2.0<-1.0 so the output is 0 ` `    ``cout << ``"fdim of (-2.0, -1.0) is "` `<< fdim(-2.0, -1.0) << endl; ` ` `  `    ``// positive difference for -1.0 and -2.0 is 1 ` `    ``cout << ``"fdim of (-1.0, -2.0) is "` `<< fdim(-1.0, -2.0) << endl; ` ` `  `    ``return` `0; ` `} `

OUTPUT :

```fdim of (2.0, 1.0) is 1
fdim of (1.0, 2.0) is 0
fdim of (-2.0, -1.0) is 0
fdim of (-1.0, -2.0) is 1
```

# CODE 2

 `#include ` `#include ` `using` `namespace` `std; ` ` `  `int` `main() ` `{ ` `    ``// positive difference for 5.0 and 4.0 is 1 ` `    ``cout << ``"fdim of (5.0, 4.0) is "` `<< fdim(5.0, 4.0) << endl; ` ` `  `    ``// here 4.0<5.0 so the output is 0 ` `    ``cout << ``"fdim of (4.0, 5.0) is "` `<< fdim(4.0, 5.0) << endl; ` ` `  `    ``// here -5.0<-4.0 so the output is 0 ` `    ``cout << ``"fdim of (-5.0, -4.0) is "` `<< fdim(-5.0, -4.0) << endl; ` ` `  `    ``// positive difference for 5.0 and 4.0 is 1 ` `    ``cout << ``"fdim of (-4.0, -5.0) is "` `<< fdim(-4.0, -5.0) << endl; ` ` `  `    ``return` `0; ` `} `

OUTPUT :

```fdim of (5.0, 4.0) is 1
fdim of (4.0, 5.0) is 0
fdim of (-5.0, -4.0) is 0
fdim of (-4.0, -5.0) is 1
```

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