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| author | Tobias Klauser <tklauser@distanz.ch> | 2008-01-27 11:37:44 +0100 |
|---|---|---|
| committer | Tobias Klauser <tklauser@xenon.tklauser.home> | 2008-01-27 11:37:44 +0100 |
| commit | 7e0f021a9aec35fd8e6725e87e3313b101d26f5e (patch) | |
| tree | b1cacc4b24393f517aeb4610e9e1021f954307a8 /reference/C/CONCEPT/assignment.html | |
Initial import (2.0.2-6)2.0.2-6
Diffstat (limited to 'reference/C/CONCEPT/assignment.html')
| -rw-r--r-- | reference/C/CONCEPT/assignment.html | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/reference/C/CONCEPT/assignment.html b/reference/C/CONCEPT/assignment.html new file mode 100644 index 0000000..5985d5b --- /dev/null +++ b/reference/C/CONCEPT/assignment.html @@ -0,0 +1,91 @@ +<title>Assignment operators.</title> +<body bgcolor="#ffffcc"> +<hr> +<center> +<h1>Assignment operators.</h1> +</center> +<hr> + +C has the following assignement operators: +<pre> + = += -= *= /= %= <<= >>= &= ^= |= +</pre> += is the obvious one. It takes the result of the expression on the right +and assigns it to the variable on the left (lvalue). +<pre> + main () + { + int a, b=4, c=10; + a = b + c; + } +</pre> +I know this is stating the obvious, but: +<ol> +<li><b>b</b> is assigned the value 4 +<li><b>c</b> is assigned the value 10 +<li><b>a</b> is assigned the result of b plus C (14). +</ol> + +<hr> +All the other operators act in a simular way. If you find yourself +coding the example on the left, it could be changed to the example on +the right. +<pre> + main () main() + { { + int a=4; int a=4; + a = a * 4; a *= 4; + } } +</pre> +The rule is as follows: +<p> +The lvalue is multiplied by the rvalue and the result assigned to the +lvalue. +<p> +Here is another example. +<pre> + main() main() + { { + int a=10, b=2; int a=10, b=2; + a /= b * 5; a = a / (b*5); + } } +</pre> +Again both preduce the same answer (1). +<p> +<hr> + +<img src=../../GRAPHICS/whiteball.gif> +<a href="inc_dec.html">Increment (++) and Decrement (--)</a><br> + +<img src=../../GRAPHICS/whiteball.gif> +<a href="bit_shift.html">Bit shifting ( >>= <<= )</a><br> + +<img src=../../GRAPHICS/whiteball.gif> +<a href="precedence.html">Operator precedence table.</a> +<hr> +<p> +<center> +<table border=2 width=80% bgcolor=ivory> +<tr align=center> +<td width=25%> +<a href="../cref.html">Top</a> +</td><td width=25%> +<a href="../master_index.html">Master Index</a> +</td><td width=25%> +<a href="../SYNTAX/keywords.html">Keywords</a> +</td><td width=25%> +<a href="../FUNCTIONS/funcref.htm">Functions</a> +</td> +</tr> +</table> +</center> +<p> + +<hr> +<address>Martin Leslie +<script language="JavaScript"> +<!-- // +document.write(document.lastModified); +// --> +</script> +</address> |