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1、复习资料（2009.5）第一章C语言基础1）int,char,float,doubleareallbasicdatatypesinClanguage.（对）2）Providedthatthelengthofintis16bits,thenthevaluescopeofunsignedintis:（B）A．0~255B．0~65535C.-32768~32767D．-256~2553）Thedeclarationis:intk=0,a=0,b=0;
unsignedlongw=5;
doublex=1.42,y=0;
thentheincorrectexpressi
2、onis_A__A．y=x%3B.w+=-2C.x=w+5D.k*=a+b4)InC,basicdatatypesareint,char,floatand_double_____.5)Givendeclaration:charc=’ 35’;thesizeofcis__1____bytes.混合数据类型的运算1）Supposedeclaration:chara=’c’;thenstatement:printf(“%d”,a);iswrong.（错）2）Supposedeclaration:inta;floatx,y;thentheresultdatatypeof
3、expression:x+a%3*(int)(x+y)%2/4is_float_____.3）Thedatatypeofexpression:18/4*sqrt(4.0)isfloat.（错）字符的ASCII值及其合理应用1)Supposedeclaration:chara;thenexpression:ch=’5+9’iscorrect.（错）
2)ASCIIof‘A’is65.thenreadthefollowingprogramandtheresultofit.
Filltheblanks:
main()
{
chara;
a=’A’+__11____;
p
4、rintf(“%c”,a);
}
result:L3)Togetacharacterwithgetchar(),youcaninputcorrespondingASCIInumberofthedesiredcharacterfromkeybord.(错)1)Supposedeclaration:
inta;
floatf;
doublei;
thentheresultdatatypeofexpression:
10+’a’+i*fis__double____.1.常量字符常量的定义形式：#definePRICE3022字符常量定义后，在程序中不能再改变其值，如PR
5、ICE++是错误的。1)Incorrectstringconstantis:(A)字符串常量A.‘abc’B.“1212”C.“0”D.“”2）IfRateisasymbolconstant,wecanuseitasRate++.（错）1.变量其值可以改变的量称为变量。一个变量应该有一个名字，在内存中占据一定的存储单元，在该存储单元中存放变量的值。变量与声明：1)Asvariablename,tmpvarandTmpVararesame.（错）2)Keywordscanbeusedasvariablenames.(错)3）Thefirstcharacterofva
6、riablenamemustbealetteroraunderscore(_).（对）4）Whichofthefollowingiserror?（A）A．Keywordscanbeusedasvariablenames.B．Wetendtouseshortnamesforlocalvariables,especiallyloopindices,andlongernamesforexternalvariables.C．Uppercaseandlowercaselettersinvariablenamesaredistinct.D．Thefirstcharactero
7、fvariablenamemustbealetteroraunderscore(_).变量赋初值1）Thestatement:intn1=n2=10;iscorrect.（错）2）Thedeclaration:floatf=f+1.1;iscorrect.（错）3）Whichofthefollowingistheillegalvariablenames?(D)A．LadB.n_10C._567D.g#k转义字符的应用1）Supposedeclaration:charc=’ 10’;thenthecountofcharacterinvariablecis___1_
8、__.当变
