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1、C语言(双语)复习资料（2013）第1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;
thentheincorrect
2、expressionis_A__A．y=x%3B.w+=-2C.x=w+5D.k*=a+b4.InC,basicdatatypesareint,char,floatand_double_____.5.Supposedeclaration:chara=’c’;thenstatement:printf(“%d”,a);iswrong.（错）6.Supposedeclaration:inta;floatx,y;thentheresultdatatypeofexpression:x+a%3*(int)(x+y)%2/4is_float_____.7.Thedatat
3、ypeofexpression:18/4*sqrt(4.0)isfloat.（错）8.Supposedeclaration:chara;thenexpression:ch=’5+9’iscorrect.（错）
9.Incorrectstringconstantis:(A)A.‘abc’B.“1212”C.“0”D.“”10.IfRateisasymbolconstant,wecanuseitasRate++.（错）11.Asvariablename,tmpvarandTmpVararesame.（错）12.Keywordscanbeusedasvariabl
4、enames.(错)13.Thefirstcharacterofvariablenamemustbealetteroraunderscore(_).（对）14.Whichofthefollowingiserror?（A）A．Keywordscanbeusedasvariablenames.B．Wetendtouseshortnamesforlocalvariables,especiallyloopindices,andlongernamesforexternalvariables.C．Uppercaseandlowercaselettersinvariabl
5、enamesaredistinct.D．Thefirstcharacterofvariablenamemustbealetteroraunderscore(_).15.Thestatement:intn1=n2=10;iscorrect.（错）16.Thedeclaration:floatf=f+1.1;iscorrect.（错）17.Whichofthefollowingistheillegalvariablenames?(D)A．LadB.n_10C._567D.g#k18.Supposedeclaration:charc=’101’;thenthec
6、ountofcharacterinvariablecis___A__.（对）19.Supposedeclaration:charc=’ 61’;thenthecountofcharacterinvariablecis___1__.（对）20.Supposedeclaration:charc=’’;thenthecountofcharacterinvariablecis___new-line_.（对）说明：转义字符以开头，nn必须是8进制数。‘102’可以视为一个字符。21.Theexpression"(x=y=w=0,y=5+w,x=y)"is
7、wrong.。（错）这是一个逗号运算符的题目，逗号运算符具有最低优先级，先计算，后取值。22.Theresultofexpression:x=(i=4,j=16,k=32)is32.（对）23.Theoperandofoperator++/--canbevariablesorconstants.（错）说明：自增自减运算符只能用于变量不能用于常量。例i++,--k（对）3++--6（错）24.The%operatorcannotbeappliedtoafloatordouble.（对）（%是取余数的运算符，只能用在整型数中）25.Commentshavenoe
8、ffecttotheperformanceofpro
