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      1. ӋC(sh)֪Rc

        rg2023-03-10 23:28:15 ӋCȼ ҪͶ
        • P(gun)]

        2017ӋC(sh)֪Rc

        ȫӋCȼԇȫy(tng)һ}y(tng)һԇPԇϙCԇY(ji)ϵʽСxӋC(sh)֪Rcgӭ!

        2017ӋC(sh)֪Rc

        ӋC(sh)֪Rc

        1)Y(ji)(gu)N: Y(ji)(gu) , ѭh(hun)Y(ji)(gu)(ѭh(hun)Y(ji)(gu)), xY(ji)(gu)(if switch)

        2)xҪmain(), Ȼx(ѭh(hun)ѭh(hun),xx)

        3)ӋCĔ(sh)(j)Xб MƵʽ. (sh)(j)ŵλþ ĵַ.

        4)bitλ ָ0 1 byte ָֹ(ji), һֹ(ji) = ˂λ.

        5)һҪӛס M ΄ ʮM

        ģ

        1gA(y)̎CZԵһ\ЕrgCZԾgijQԴASCII(sh)ֵıļС

        2ÿCZԳmain(sh)ֻһ

        3ں(sh)вٶx(sh)

        4㷨һҪݔԛ]ݔ

        5breakѭh(hun)Y(ji)(gu)switchZ

        6̖\ļe

        һ

        1)ϷÑR飺

        ϷҪĸ(sh)„MԪؾe

        ҵһ횞ĸt„һ锵(sh)־e

        P(gun)IֲÑR̖main define scanf printf P(gun)IԻĵطIfǿÑRIfеĵһĸԲP(gun)I

        2)͔(sh)(j)ĺϷʽ

        2.333e-1 ǺϷҔ(sh)(j)2.333×10-1

        ԇEeǰeД(sh)e؞(sh).

        3)ַ(sh)(j)ĺϷʽ:

        '1' ַռһֹ(ji)"1"ַռɂֹ(ji)(һY(ji)̖)

        '0' ASCII(sh)ֵʾ48'a' ASCII(sh)ֵ97'A'ASCII(sh)ֵ65

        4) һǃɂֹ(ji), ַһֹ(ji)pһ4ֹ(ji)

        ԇrһf16λgϵy(tng)32λϵy(tng)@NrҪȥһ}һǃɂֹ(ji), ַһֹ(ji)pһ4ֹ(ji)Ϳ

        5)D(zhun)xַĿ飺

        ڳ int a = 0x6dǰһʮMƵĔ(sh)o׃a ע@0x횴

        ڳ int a = 06d, һMƵʽ

        D(zhun)xַ’\x6d’ ǺϷģ0܌xС

        ‘\141’ ǺϷ 0Dz܌

        ‘\108’ǷǷģ鲻ԳF(xin)8

        6)g(sh)\̖ă(yu)ȼe

        ͬeеǏңеǏҵ

        7)D(zhun)Q

        һ (int)a int(a)עһ̖

        ע(int)(a+b)(int)a+b ą^(q)e ǰǰa+bD(zhun)ǰaD(zhun)ټb

        8)_ʽĿ飺

        DZ_ʽһД(sh)ֵ

        xֵ_ʽ_ʽ(sh)ֵ߅Ĕ(sh)ֵa=b=5;ԓ_ʽ5xֵ

        ԼԜp_ʽO(sh)a=5++a(Ǟ6) a++(5);

        \еęC++a Ȱ׃Ĕ(sh)ֵ1ȻѵõĔ(sh)ֵŵ׃aȻ@

        ++a_ʽĔ(sh)ֵ6a++ԓ_ʽĔ(sh)ֵ5ȻٰaĔ(sh)ֵ16

        ٷŵ׃aС M++aa++ijõaԒ׃aе6

        ԇE++ǰȼӺã++ںúӡ

        ̖_ʽ(yu)ȼe ;_ʽĔ(sh)ֵ̖߅ǂ_ʽĔ(sh)ֵ

        (234)ı_ʽĔ(sh)ֵ4

        9)λ\Ŀ飺

        һ}ԇ}Ŀ

        ̎׺еλ\}ĿҪ@́̎(ȰʮM׃ɶM׃ʮM)

        1char a = 6, b;

        b = a<<2; @N}ĿӋҪaʮM6ɶMλ\

        2һҪӛס

        3ڛ]ȥ(sh)(j)ĕr<<һλʾ2;>>һλʾ2

        10)018Ĕ(sh)ֵǷǷMǛ]88M1

        11)%̖߅Ҫ(sh)(sh)eˡ

        12)NȡGС(sh)r

        1int a =1.6;

        2(int)a;

        ڶ

        1)printf(sh)ĸʽ飺

        %d(yng);%c(yng)ַ;%f(yng)ξȵȵȵR

        %ld(yng) long int;%lf (yng)double

        2)scanf(sh)ĸʽ죺

        עԓ(sh)ĵڶ&a @ӵĵַa;

        Scanf(“%d%d%*d%d”,&a,&b,&c); ^ݔĵ(sh)(j)

        3)putchar ,getchar (sh)Ŀ飺

        char a = getchar() Ǜ]Ѕ(sh)IPõݔһַo׃a

        putchar(‘y’)ַyݔĻ

        4)ΌF(xin)ɂ׃x yД(sh)ֵĻQ(Ҫ)

        ԰ x=y ,y=x; Ҫg׃ t=x;x=y;y=t

        5)ΌF(xin)λС(sh)λij(Ҫ)

        @ƏVxע x = (int)x @ǰС(sh)ȥ

        ؄eҪע⣺cZ÷0ʾ߉݋0ʾ߉݋ٵġ

        1)P(gun)ϵ_ʽ

        _ʽĔ(sh)ֵֻܞ1(ʾ)0(ʾ)

        P(gun)ϵı_Ǟĕrõ1 9>8@Ա_ʽĔ(sh)ֵ1;

        2)߉݋_ʽ

        ֻܞ1(ʾ)0(ʾ)

        a) && || ! N߉݋\̖

        b) !>&&>|| (yu)ȵļe

        c) ע·F(xin)ԇ^ϲg

        d) Ҫʾ x DZ010Сķ0

        3)if Z

        else cӽifқ]elseMϵ

        4)l_ʽ

        _ʽ1 ?_ʽ2 _ʽ3

        עǮ0rDZ_ʽ2Ĕ(sh)ֵ0ǾDZ_ʽ2Ĕ(sh)ֵ

        ԇEǰٺ

        5)switchZ䣺

        a)һҪע break ͛]breakIJe(34)ăɂӣ]breakrֻҪһcaseƥʣµĶҪ(zh)breaktֱswicheZ䡣

        b)switchֻԺbreakһԺcontinue

        1)Nѭh(hun)Y(ji)(gu)

        a)for() ; while(); do- while()N

        b)forѭh(hun)бǃɂ̖ǧfҪӛ

        c)ĕrһҪעѭh(hun)һҪнY(ji)ėltѭh(hun)

        d) do-while()ѭh(hun)һwhile();ķ̖һ܉G(ϙCe)

        2) break continueIJe

        ӛ

        breakǴƵ˼(ѭh(hun))ԿҊbreak˳?zhn)һѭh(hun)

        continue^m(x)˼(^m(x)ѭh(hun)\)ҪY(ji)ѭh(hun)ѭh(hun)w(ni)ʣµZ䲻و(zh)Уѭh(hun)_ʼȻДѭh(hun)lMһ݆ѭh(hun)

        3)Ƕѭh(hun)

        ѭh(hun)߀ѭh(hun)@N^sҪһһһһĵӋ㣬һӛסɌ̎S(sh)M

        4) while((c=getchar())!=’\n’) while(c=getchar() !=’\n’)IJe

        ȿa = 3 != 2 (a=3)!=2 ą^(q)e

        (!=̖ļe=̖ ԵһӋ 3!=2) һaĔ(sh)ֵǵõ1;ڶaĔ(sh)ֵ3

        ԇעc: ̖@Ҫ

        (sh)ǾһܵһK;

        1) (sh)ą(sh)ؔ(sh)ֵ(ʾD)

        main()

        {

        int a = 5,b=6,c;

        c = add(a,b);

        printf(“%d”,c);

        }

        {(dio)ú(sh)

        a,bnj

        (sh)õһ(sh)ֵ

        Add(sh)ķؔ(sh)ֵ

        int add ( int x, int y)

        {

        int z;

        z=x+y;

        return z;

        }

        {(dio)ú(sh)

        xyʽ(sh)

        (sh)ؔ(sh)ֵ

        z@add(sh)ӋõĽY(ji)Ǻ(sh)ؽoķؔ(sh)ֵ

        ڏ(zh)˺(sh)addabĔ(sh)ֵo{(dio)ú(sh)򕺕rДȴؔ(sh)ֵ?sh)õ˷ؔ?sh)ֵˆ(zh)

        2)һҪעⅢ(sh)֮gĂf

        ΅֮g (sh)ֵַ͂IJe(ԇc)

        (sh)ֵԒ΅׃׃׃

        ַԒ΅׃͕пܸ׃׃

        3)(sh)•Ŀ飺

        һҪУ(sh)(sh)ķ(sh)ą(sh)

        һҪУ΅Q

        ָ׃ı|(zh)Áŵַһ׃ǷŔ(sh)ֵ'

        int *p *ppIJe

        *pԮ׃;*ȡַpĔ(sh)ֵ

        pǮַʹá

        *p++ (*p)++֮gIJee}ĿкҪ

        *p++ ַ׃

        (*p)++ ǔ(sh)ֵҪ׃

        x(ԇc)

        (sh)MʾһԪصĵַ(sh)MԼǵַ(˺ܶ)

        (sh)ʾԓ(sh)ڵַ

        ַʾһַĵַ

        1һS(sh)MҪ

        a[10]@(sh)MӑՓ

        1aʾ(sh)MǵһԪصĵַҲԪa[10]ĵַ

        2aǵַֻҪF(xin)a++a=a+2xֵĶe`

        3aһS(sh)MָҲfa+1һС

        a[3][3]ӑՓ

        1aʾ(sh)MǵһԪصĵַҲԪa[10]ĵַ

        2aǵַֻҪF(xin)a++a=a+2xֵĶe`

        3aǶS(sh)MָҲfa+1һС

        4a[0]a[1]a[2]ҲǵַԌMxֵͬrָᘣa[0]+1a[1]+1a[2]+1һ

        5עaa[0] a[1]a[2]DzͬĻDzͬǰһԪһԪ

        S(sh)M}Ŀļɣ

        a[3][3]={1,2,3,4,5,6,7,8,9}@ӵ}Ŀ

        Eһɣ

        һСڶС

        a[0]à 1 2 3 ->һ

        a[1]à 4 5 6 —>ڶ

        a[2]à 7 8 9 ->

        E@}ĿgܺΣ

        *(a[0]+1)҂֪ǵһеĵһԪһô@a[0][1]Ԫأ1

        *(a[1]+2)҂֪ǵڶеĵһԪô@a[1][2]Ԫ6

        һӛֻҪǶS(sh)M}Ŀһnjϵĸʽȥ}Ŀ@ӕ^

        (sh)MijʼһSͶSģһSԲSڶһҪ

        int a[]={12} Ϸ int a[][4]={234}Ϸ int a[4][]={234}Ƿ

        S(sh)Mеָ

        int a[1][2];

        aF(xin)ھһָᘣa+1һД(sh)MԪ (*)p[2]ָ

        a[0]a[1]F(xin)ھһָa[0]+1 һ(sh)MԪ*p[2]ָᘔ(sh)Mʹ

        ߀ӛסÓ·t

        a[2] ׃ *(a+2) a[2][3]׃ *(a+2)[3]ٿ׃ *(*(a+2)+3)

        @˼Ҫ!

        ӋC(sh)֪RcP(gun)£

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        СWӢZ40֪Rc08-30

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