【免费】C标准函数库-----资源-CSDN文库

共127个文件

gif：90个

html：34个

wd3：2个

C标准函数库

4星 · 超过85%的资源需积分: 0 57 浏览量 2016-09-28 14:15:02 上传评论 1 收藏 290KB RAR 举报

资源推荐

资源详情

资源评论

收起资源包目录

C标准函数库----- （127个子文件）

statment.gif 7KB

type_cl.gif 6KB

stream.gif 5KB

expr_cl.gif 4KB

namesp.gif 4KB

type_pt.gif 3KB

ctype.gif 3KB

if_grp.gif 2KB

term.gif 2KB

postfix.gif 2KB

strtod.gif 2KB

decl.gif 2KB

scan.gif 2KB

flt_con.gif 2KB

print.gif 2KB

block_d.gif 2KB

format.gif 2KB

include.gif 2KB

outer_d.gif 2KB

int_con.gif 2KB

decl_tor.gif 2KB

time.gif 2KB

param_d.gif 2KB

fun_def.gif 2KB

horiz_ws.gif 2KB

escape.gif 2KB

fun_mod.gif 2KB

switch_f.gif 1KB

str_lit.gif 1KB

member_d.gif 1KB

define.gif 1KB

char_con.gif 1KB

line_grp.gif 1KB

proto_d.gif 1KB

line.gif 1KB

expr.gif 1KB

infix.gif 1KB

number.gif 1KB

for_f.gif 1KB

prefix.gif 1KB

value.gif 1KB

type_d.gif 1KB

tr_unit.gif 1012B

while_f.gif 1004B

do_f.gif 988B

for_s.gif 959B

ifelse_s.gif 953B

strtol.gif 932B

ifelse_f.gif 930B

block_f.gif 919B

block.gif 908B

do_s.gif 868B

name.gif 845B

pragma.gif 805B

switch_s.gif 774B

while_s.gif 769B

error.gif 761B

if_f.gif 758B

ptr_mod.gif 742B

if_s.gif 731B

elif.gif 682B

ifndef.gif 668B

casel_s.gif 664B

undef.gif 663B

if.gif 652B

ifdef.gif 652B

arr_mod.gif 644B

def_f.gif 629B

def_s.gif 608B

casel_f.gif 606B

gotol_f.gif 589B

endif.gif 583B

return_s.gif 574B

vert_ws.gif 573B

gotol_s.gif 564B

goto_s.gif 563B

return_f.gif 561B

else.gif 554B

expr_s.gif 549B

cont_s.gif 523B

break_s.gif 499B

null.gif 480B

expr_f.gif 466B

opt.gif 444B

goto_f.gif 439B

null_s.gif 402B

end_line.gif 400B

cont_f.gif 385B

break_f.gif 368B

null_f.gif 225B

default.htm 9KB

express.html 83KB

_index.html 57KB

wchar.html 54KB

stdio.html 41KB

declare.html 41KB

function.html 36KB

preproc.html 33KB

portable.html 32KB

stdlib.html 31KB

共 127 条

<HTML><HEAD><TITLE>Expressions</TITLE></HEAD><BODY BGCOLOR="#FFFFFF"> <H1><A NAME="Expressions">Expressions</A></H1><HR> <A HREF="#Expression Subcontexts">Expression Subcontexts</A> · <A HREF="#Classes of Expressions">Classes of Expressions</A> · <A HREF="#Class Conversions">Class Conversions</A> · <A HREF="#Type Conversions">Type Conversions</A> · <A HREF="#Promoting">Promoting</A> · <A HREF="#Balancing">Balancing</A> · <A HREF="#Assigning and Type Casting">Assigning and Type Casting</A> · <A HREF="#Changing Representations">Changing Representations</A> · <A HREF="#Pointer Arithmetic">Pointer Arithmetic</A> · <A HREF="#Reading Expressions">Reading Expressions</A> · <A HREF="#Grouping">Grouping</A> · <A HREF="#Operator Summary">Operator Summary</A> · <A HREF="#Order of Evaluation">Order of Evaluation</A> <A HREF="#Add Assign">Add Assign</A> · <A HREF="#Add">Add</A> · <A HREF="#Address of">Address of</A> · <A HREF="#Assignment">Assignment</A> · <A HREF="#Bitwise AND Assign">Bitwise AND Assign</A> · <A HREF="#Bitwise AND">Bitwise AND</A> · <A HREF="#Bitwise Exclusive OR Assign">Bitwise Exclusive OR Assign</A> · <A HREF="#Bitwise Exclusive OR">Bitwise Exclusive OR</A> · <A HREF="#Bitwise Inclusive OR Assign">Bitwise Inclusive OR Assign</A> · <A HREF="#Bitwise Inclusive OR">Bitwise Inclusive OR</A> · <A HREF="#Bitwise NOT">Bitwise NOT</A> · <A HREF="#Comma">Comma</A> · <A HREF="#Conditional">Conditional</A> · <A HREF="#Divide Assign">Divide Assign</A> · <A HREF="#Divide">Divide</A> · <A HREF="#Equals">Equals</A> · <A HREF="#Function Call">Function Call</A> · <A HREF="#Greater Than Or Equal">Greater Than Or Equal</A> · <A HREF="#Greater Than">Greater Than</A> · <A HREF="#Indirection">Indirection</A> · <A HREF="#Left Shift Assign">Left Shift Assign</A> · <A HREF="#Left Shift">Left Shift</A> · <A HREF="#Less Than Or Equal">Less Than Or Equal</A> · <A HREF="#Less Than">Less Than</A> · <A HREF="#Logical AND">Logical AND</A> · <A HREF="#Logical NOT">Logical NOT</A> · <A HREF="#Logical OR">Logical OR</A> · <A HREF="#Minus"></A> · <A HREF="#Multiply Assign">Multiply Assign</A> · <A HREF="#Multiply">Multiply</A> · <A HREF="#Not Equals">Not Equals</A> · <A HREF="#Plus">Plus</A> · <A HREF="#Point at">Point at</A> · <A HREF="#Postdecrement">Postdecrement</A> · <A HREF="#Postincrement">Postincrement</A> · <A HREF="#Predecrement">Predecrement</A> · <A HREF="#Preincrement">Preincrement</A> · <A HREF="#Remainder Assign">Remainder Assign</A> · <A HREF="#Remainder">Remainder</A> · <A HREF="#Right Shift Assign">Right Shift Assign</A> · <A HREF="#Right Shift">Right Shift</A> · <A HREF="#Select">Select</A> · <A HREF="#sizeof operator">sizeof</A> · <A HREF="#Subscript">Subscript</A> · <A HREF="#Subtract Assign">Subtract Assign</A> · <A HREF="#Subtract">Subtract</A> · <A HREF="#Type Cast">Type Cast</A> <HR> You write expressions to determine values, to alter values stored in objects, and to call functions that perform input and output. In fact, you express all computations in the program by writing expressions. The translator itself must evaluate some of the expressions you write to determine properties of the program. The translator or the target environment must evaluate other expressions prior to <A HREF="lib_over.html#program startup">program startup</A> to determine the initial values stored in objects with <A HREF="declare.html#static duration">static duration</A>. The program evaluates the remaining expressions when it executes. This document describes the different <A HREF="#Classes of Expressions">classes of expressions</A> and the restrictions on each class. It presents the common rules for writing all expressions, determining their types, and computing their values. It also discusses the constraints on the <A HREF="function.html#flow of control">flow of control</A> through an expression. <H2><A NAME="Expression Subcontexts">Expression Subcontexts</A></H2> Within a statement or declaration, every full expression that you write inhabits one of three contexts: <UL> <LI>a <A HREF="function.html#test context">test context</A></LI> <LI>a <A HREF="function.html#value context">value context</A></LI> <LI>a <A HREF="function.html#side-effects context">side-effects context</A></LI> </UL> More generally, however, every full expression or subexpression that you write inhabits one of four <A NAME="expression subcontext">expression subcontexts</A>, depending on its goal: <UL> <LI>an <A HREF="#rvalue subcontext">rvalue subcontext</A>, which includes test and value contexts <LI>an <A HREF="#lvalue subcontext">lvalue subcontext</A></LI> <LI>a <A HREF="#function-designator subcontext">function-designator subcontext</A></LI> <LI>a <A HREF="#side-effects subcontext">side-effects subcontext</A></LI> </UL> An <A NAME="rvalue subcontext">rvalue subcontext</A> specifies a value that has an <A HREF="types.html#object types">object type</A> other than an <A HREF="types.html#Array Types">array type</A>. You create an rvalue subcontext wherever you need to specify a test or value to the translator, determine an initial value prior to <A HREF="lib_over.html#program startup">program startup</A> or compute a value when the program executes. An <A NAME="lvalue subcontext">lvalue subcontext</A> designates an object, but its expression can have either an object type or an incomplete type. You create an lvalue subcontext wherever you need to access the value stored in an object, alter the stored value, or determine the address of the object. (If the type is incomplete, you can determine only the address of the object.) A <A NAME="function-designator subcontext">function-designator subcontext</A> designates a function. Hence, its expression has a function type. You create a function-designator subcontext wherever you need to call a function or determine its address. A <A NAME="side-effects subcontext">side-effects subcontext</A> specifies no value and designates no object or function. Hence, its expression can have a <A HREF="types.html#void types">void type</A>. You create a side-effects subcontext when you need to cause only side effects. For example, consider the following code sequence: <PRE> void f(int); int x; f(x = 3);</PRE> In the last line: <UL> <LI><CODE>f</CODE> is in a function-designator subcontext</LI> <LI><CODE>x</CODE> is in an lvalue subcontext</LI> <LI><CODE>3</CODE> and <CODE>x = 3</CODE> are both in rvalue subcontexts</LI> <LI><CODE>f(x = 3)</CODE> is in a side-effects subcontext</LI> </UL> <H2><A NAME="Classes of Expressions">Classes of Expressions</A></H2> Every expression that you write belongs to one of several expression classes, depending upon its form. Four of these classes are closely associated with the four <A HREF="#Expression Subcontexts">expression subcontexts</A>: <UL> <LI>An <A NAME="rvalue expression">rvalue expression</A> has an <A HREF="types.html#object types">object type</A> other than an <A HREF="types.html#Array Types">array type</A>.</LI> <LI>An <A NAME="lvalue expression">lvalue expression</A> designates an object and has an object type or an <A HREF="types.html#Incomplete Types">incomplete type</A>.</LI> <LI>A <A NAME="function-designator expression">function-designator expression</A> has a <A HREF="types.html#Function Types">function type</A>

评论收藏

内容反馈