C++基础教程素材1

/*Thisprogramwritestwomessagestothescreen,sayanythingatall.Butmakethemessagesontwoseparatelines.*///Thisisacomment.//ThisisaC++program.#includeiostream.hvoidmain(){doublex,y;cout″Entertwofloatnumbers:″;cinxy;doublez=x+y;cout″x+y=″zendl;}#includeiostream.hvoidmain(){inta,b;a=5;b=7;cout″a*b=″a*bendl;}#includeiostream.hvoidmain(){inta,b;a=5;b=7;cout″a*b=″a*bendl;}a*b=35File→New→File→C++SourceFile#includeiostream.hintadd(int,int);voidmain(){inta,b;a=5;b=7;intc=add(a,b);cout″a+b=″cendl;}intadd(intx,inty){returnx+y;}xx.obj—0error(s),0Warning(s)××.exe—0error(s),0warning(s)a+b=12Pressanykeytocontinue#includeiostream.hintadd(int,int);voidmain(){inta,b;a=5;b=7;intc=add(a,b);cout″a+b=″cendl;}intadd(intx,inty){returnx+y;}a+b=12#includeiostream.hvoidmain(){cout″BeiJing″″″;cout″ShangHai″″＼n″;cout″TianJing″endl;}#includeiostream.hvoidmain(){inta,b;cout″Inputa,b:″;cinab;cout″a=″a″,″″b=″bendl;cout″a-b=″a-b″＼n″;}#includeiostream.hvoidmain(){charc=′m′;intd=5;cout″d=″d″;″;cout″c=″c″＼n″;}main(){cout″Thisisastring!″}#includeiostream.hvoidmain(){cinx;intp=x*x;cout″p=p＼n″;}#includeiostream.hvoidmain(){inti,j;i=5;intk=i+j;cout″i+j=″k″＼n″;}＼ddd＼xhh＼101或＼x41″Thisisastring.″″abcdef＼n″″＼tabc＼txyz!＼mnp＼tefg!″′m′-′p′+1″m″+″p″+1constintsize=80;charc;c=′a′；doubleprice=15.5;intsize=100;inta［3］;charb［3］［5］;floatc［3］［5］［7］;constintsize=80;intm［size］;232数组的赋值inta［5］；intb［2］［4］;intc［2］［3］［4］;inta［5］={1,2,3,4,5};inta［4］={5,4};intb［2］［3］={{1,2,3},{4,5,6}};intb［2］［3］={1,2,3,4,5,6};intb［2］［3］={{1,2},{3}};intc［2］［3］［2］={{{1,2},{3,4},{5,6}},{{7,8},{9,10},{11,12}}};intc［2］［3］［2］={1,2,3,4,5,6,7,8,9,10,11,12};intc［2］［3］［2］={{{5,4},{3}},{{2},{1,0}}};intm［3］;m［0］=5;m［1］=3;m［2］=1;inta［10］;for(inti=0;i10;i++)a［i］=i*2+1;chars1［4］={′a′,′b′,′c′,′d′};chars2［5］={′a′,′b′,′c′,′d′,′＼0′}；chars2［5］=″abcd″;chars3［5］=″abcde″;chars3［］=″abcde″;charss［3］［4］={{′a′,′b′,′c′,′＼0′},{′m′,′n′,′p′,′＼0′}，{′x′,′y′,′z′,′＼0′}}；charss［3］［4］={″abc″,″mnp″,″xyz″};charss［］［4］={″abc″,″mnp″,″xyz″};charsss［］［3］［5］={″wang″,″hang″,″lang″,″tang″,″fang″,″kang″};enum枚举名{枚举表}；enumday{Sum,Mon,Tue,Wed,Thu,Fri,Sat};enumday{Sum=7,Mon=1,Tue,Wed,Thu,Fri,Sat};enum枚举名枚举变量名表；enumdayd1,d2,d3;enumday{Sum,Mon,Tue,Wed,Thu,Fri,Sat}d1,d2,d3;enumcolor{RED,BLUE,YELLOW,BLACK,WHITE};enumcolorc1,c2,c3;d1=Sum;d2=Sat;c1=RED;c2=BLUE;d3=YELLOW;c3=3;c3=(enumcolor)3;c3=enumcolor(3);c3=BLACK;inta(5);int*p=&a；类型*指针名，*指针名，…；int*pi;//pi是一个指向int型变量的指针float*pl;//pl是一个指向float型变量的指针char*pc;//pc是一个指向char型变量的指针char(*pa)［3］;//pa是一个指向一维数组的指针int(*pf)();//pf是一个指向函数的指针，该函数的返回值为int型数值int**pp;//pp是一个指向指针的指针，即二级指针inta,b［10］;inta［10］,*p=a;intb［2］［3］,(*p)［3］;p=b;doublesin(doublex);double(*pf)();pf=sin;inta,*p=&a,*q;q=p;inta［5］;a［i］其中，i=0,1,2,3,4。*(a+i)inta［10］,*p;p=a;intb［2］［5］;b［i］［j］其中，i=0,1;j=0,1,2,3,4。*(*(b+i)+j)其中，i=0,1;j=0,1,2,3,4。*(*(b+i)+j)*(b［i］+j)(*(b+i))［j］*(&b［0］［0］+5*i+j)#includeiostream.hvoidmain(){staticinta［5］={5,4,3,2,1};inti,j;i=a［0］+a［4］;j=*(a+2)+*(a+4);coutiendlj;}#includeiostream.hvoidmain(){staticchars1［］=″abcde″,s2［5］={′m′,′n′,′p′,′q′,′＼0′};char*ps=s1;couts1″or″s2;cout′＼n′;couts2［1］s2［2］s1［3］s1［4］endl;cout*ps*(ps+2)*(ps+4)*ps+2;}abcdeormnpqnpdeace99#includeiostream.hvoidmain(){staticintb［］［3］={{1,2,3},{4},{5,6}};b［0］［2］=7;b［1］［2］=8;cout**b″＼t″**(b+1)″＼t″*(*(b+1)+2)″＼n″;coutb［0］［2］+b［1］［2］+b［2］［2］;}14815#includeiostream.hvoidmain(){staticchart［］［3］［5］={″abcd″,″efgh″,″ijkl″,″mnop″,″qrst″,″uvwx″};coutt［1］［2］［3］*(t［1］［2］+3)*(*(*(t+1)+2)+3)*(*(t［1］+2)+3)endl;cout**t″＼t″*(*(t+1)+1)″＼t″t［0］［2］″＼t″**t+1endl;}xxxxabcdqrstijklbcd类型&引用名(变量名)；类型&引用名=变量名；inta=3;int&m=a;m=m+5;intn=m;int*p=&m;int&d=120;intt=120;int&d=t;floatf=5.6int&e=f;inttemp=int(f);int&e=temp;#includeiostream.hvoidmain(){intval(5);int&refv=val;refv=refv+5;coutvalendl;int*p=&refv,val1(refv);cout*p″＼t″val1endl;}inta［10］;sizeof(int);sizeofa;sizeof(a)/sizeof(int);inta;doubleb=3.8921;a=int(b)+(int)b;inta,*pa;pa=&a；inta,*pa=&a;*pa=5;inta(3)b(5);a+］++b#includeiostream.hvoidmain(){inta;a=7*2+-3%5-4/3;floatb;b=510+3.2e3-5.6/0.03;couta″＼t″bendl;intm(3),n(4);a=m++---n;couta″＼t″m″＼t″nendl;}103523.33043#includeiostream.hvoidmain(){unsigneda(0xab),b(20);a&=b;a^=a;couta″＼t″bendl;intx(-3),y(5);xy;x=y;x|[]|=y^~y;y&=~x+1;coutx″＼t″yendl;}#includeiostream.hvoidmain(){charx(′m′),y(′n′);intn;n=xy;coutnendl;n=x==y-1;coutnendl;n=(′y′!=′Y′)+(53)+(y-x==1);coutnendl;}113inta(3),b(0);!a&&a+b&&a++;#includeiostream.hvoidmain(){intx,y,z;x=y=z=1;--x&&++y&&++z;coutx′＼t′y′＼t′z′＼n′;++x&&++y&&++z;coutx′＼t′y′＼t′z′＼n′;++x&&y--||++z;coutx′＼t′y′＼t′z′＼n′;}#includeiostream.hvoidmain(){inta(3),b(4),c;c=ab?++a:++b;couta″,″b″,″cendl;c=a-b?a+b:a-3?b:a;couta″,″b″,″cendl;}inta,b,c,d;a=b=c=d=3;inta(3),b(4);a*=b+1;#includeiostream.hvoidmain(){intx(1),y(