SW006013 Microchip Technology, SW006013 Datasheet - Page 113

• Manufacturer Part Number: SW006013
• Description: MPLAB C Compiler For DsPIC DSCs
• Manufacturer: Microchip Technology
• Series: DsPIC30F/33Fr
• Type: MPLAB® C Compilerr

Specifications of SW006013

• Supported Families: DsPIC30F, DsPIC33F
• Core Architecture: DsPIC
• Kit Contents: Software And Docs
• Mcu Supported Families: DsPIC30F And DsPIC33F
• Tool Function: Compiler
• Tool Type: Compiler
• Processor Series: dsPIC
• Lead Free Status / RoHS Status: na
• For Use With/related Products: dSPIC DSCs
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2008 Microchip Technology Inc.
srand
Description:
Include:
Prototype:
Argument:
Return Value:
Remarks:
Example:
strtod
Description:
Include:
Prototype:
Arguments:
Return Value:
Remarks:
Set the starting seed for the pseudo-random number sequence.
<stdlib.h>
void srand(unsigned int seed);
seed
None
This function sets the starting seed for the pseudo-random number
sequence generated by the rand function. The rand function will
always return the same sequence of integers when identical seed val-
ues are used. If rand is called with a seed value of 1, the sequence of
numbers generated will be the same as if rand had been called without
srand having been called first.
#include <stdio.h>
#include <stdlib.h> /* for rand, srand */
int main(void)
{
}
Output:
Number = 16327
Number = 5931
Number = 23117
Number = 30985
Number = 29612
Converts a partial string to a floating-point number of type double.
<stdlib.h>
double strtod(const char *s, char **endptr);
s
endptr
Returns the converted number if successful; otherwise, returns 0.
The number may consist of the following:
optional whitespace, followed by an optional sign, then a sequence
of one or more digits with an optional decimal point, followed by one
or more optional digits and an optional e or E followed by an optional
signed exponent.
strtod converts the string until it reaches a character that cannot be
converted to a number. endptr will point to the remainder of the string
starting with the first unconverted character.
If a range error occurs, errno will be set.
int x;
srand(7);
for (x = 0; x < 5; x++)
[whitespace] [sign] digits [.digits]
printf("Number = %d\n", rand());
[ { e | E }[sign]digits]
starting value for the pseudo-random number sequence
string to be converted
pointer to the character at which the conversion stopped
/* for printf
*/
DS51456E-page 109