Abl-electronic PIC Microcontrollers PIC16 Manuel d'utilisateur télécharger pdf (Page 127)

100

101

Iteration Statements

Iteration statements let you loop a set of statements. There are three forms of itera-

tion statements in C: while, do, and for.

While Statement

Use the

while keyword to conditionally iterate a statement. Syntax of while

statement is:

while (

expression

)

statement

The

statement

executes repeatedly until the value of expression is false. The test

takes place before

statement

executes. Thus, if

expression

evaluates to false

on the first pass, the loop does not execute.

Parentheses around

expression

are mandatory.

Here is an example of calculating scalar product of two vectors, using the

while

statement:

int s = 0, i = 0;

while (i < n) {

s += a[i] * b[i];

i++;

}

Note that body of a loop can be a null statement. For example:

while (*q++ = *p++);

MikroElektronika:

Development

tools

Books

Compilers

119

page

mikroC

- C Compiler for Microchip PIC microcontrollers

mikroC

making it simple...

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 311 312

Commentaires sur ces manuels

Pas de commentaire

Abl-electronic PIC Microcontrollers PIC16 Manuel d'utilisateur Page 127

Commentaires sur ces manuels