From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Sun, 27 Jan 2008 11:37:44 +0100 Subject: Initial import (2.0.2-6) --- reference/C/FUNCTIONS/qsort.html | 100 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 reference/C/FUNCTIONS/qsort.html (limited to 'reference/C/FUNCTIONS/qsort.html') diff --git a/reference/C/FUNCTIONS/qsort.html b/reference/C/FUNCTIONS/qsort.html new file mode 100644 index 0000000..466cd4e --- /dev/null +++ b/reference/C/FUNCTIONS/qsort.html @@ -0,0 +1,100 @@ +qsort function + + + + + + + +

qsort function

+ +

+qsort will sort an array of elements. This is a wild function that +uses a pointer to another function that performs +the required comparisons. + +

+Library:   stdlib.h
+
+Prototype: void qsort(void *base, 
+		      size_t num, 
+		      size_t size, 
+ 		      int (*comp_func)(const void *, const void *))
+
+

Some explanation.

```
void * base
```
Is a pointer to the array to be sorted. This can +be a pointer to any datatype. +
+
```
size_t num
```
The number of elements. +
+
```
size_t size
```
The element size. +
+

int (*comp_func)(const void *, const void *))

This is a +pointer to +a function. +

+ + +

Notes

Well... This caused me alot of trouble! Although the prototype above is +exactly as shown in the documentation, the last parm kept giving compiler +warnings (invalid pointer type) this is the fix. +
```
+	
+Prototype: void qsort(void *base, 
+		      size_t num, 
+		      size_t size, 
+ 		      (void *) (*comp_func)(const void *, const void *))
+
```
+does anyone know the answer to this problem?? +
+
I think void * needs an explanation. +
+
And cast aswell +
+

+ +

+Example program 1 As basic as I can make it.

+ + +Example program with user input.

+ + +O'Reilly 'Using C' example.

+ + +

+ +

+ + + + +

+ Top +

+ Master Index +

+ Keywords +

+ Functions +

+ +

Martin Leslie +

+ + -- cgit v1.2.3-54-g00ecf