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ӋC(sh)֪Rc

rg2024-09-05 17:01:02 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 M(jn)Ƶʽ. (sh)(j)ŵλþ ĵַ.

4)bitλ ָ0 1 byte ָֹ(ji), һֹ(ji) = ˂λ.

5)һҪӛס M(jn) ΄ ʮM(jn)

ģ

1gA(y)̎CZԵһ\ЕrgCZԾgijQԴASCII(sh)ֵıļС

2ÿCZԳmain(sh)ֻһ

3ں(sh)вٶx(sh)

4㷨һҪݔԛ]ݔ롣

5breakѭh(hun)Y(ji)(gu)switchZ䡣

6̖\ļe͡

һ

1)ϷÑ(bio)R飺

ϷҪĸ(sh)֣„MԪؾeˡ

ҵһ횞ĸt„һ锵(sh)־e

P(gun)IֲÑ(bio)R̖main define scanf printf P(gun)I֡ԻĵطIfǿÑ(bio)RIfеĵһĸˣԲP(gun)I

2)͔(sh)(j)ĺϷʽ

2.333e-1 ǺϷģҔ(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)@NrҪȥܣһ}һǃɂֹ(ji), ַһֹ(ji)pһ4ֹ(ji)Ϳ

5)D(zhun)xַĿ飺

ڳ int a = 0x6dǰһʮM(jn)ƵĔ(sh)o׃a ע@0x횴

ڳ int a = 06d, һM(jn)Ƶʽ

D(zhun)xַ’\x6d’ ǺϷģ0܌xС

‘\141’ ǺϷ 0Dz܌ġ

‘\108’ǷǷ鲻ԳF(xin)8

6)g(sh)\̖ă(yu)ȼe

ͬeеǏеǏҵ

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)_(d)ʽĿ飺

DZ_(d)ʽһД(sh)ֵ

xֵ_(d)ʽ_(d)ʽ(sh)ֵ߅Ĕ(sh)ֵa=b=5;ԓ_(d)ʽ5xֵ

ԼԜp_(d)ʽO(sh)a=5++a(Ǟ6) a++(5);

\еęC++a Ȱ׃Ĕ(sh)ֵ1ȻѵõĔ(sh)ֵŵ׃aȻ@

++a_(d)ʽĔ(sh)ֵ6a++ԓ_(d)ʽĔ(sh)ֵ5ȻٰaĔ(sh)ֵ16

ٷŵ׃a M(jn)++aa++ijõaԒ׃aе6ˡ

ԇE++ǰȼӺ++ںúӡ

̖_(d)ʽ(yu)ȼe ;_(d)ʽĔ(sh)ֵ̖߅ǂ_(d)ʽĔ(sh)ֵ

(234)ı_(d)ʽĔ(sh)ֵ4

9)λ\Ŀ飺

һ}ԇ}Ŀ

̎׺еλ\}ĿҪ@́̎(ȰʮM(jn)׃ɶM(jn)׃ʮM(jn))

1char a = 6, b;

b = a<<2; @N}ĿӋҪaʮM(jn)6ɶM(jn)ƣλ\

2һҪӛס

3ڛ]ȥ(sh)(j)ĕr<<һλʾ2;>>һλʾ2

10)018Ĕ(sh)ֵǷǷM(jn)Ǜ]88M(jn)1

11)%̖߅Ҫ(sh)(sh)e

12)NȡGС(sh)r

1int a =1.6;

2(int)a;

ڶ

1)printf(sh)ĸʽ飺

%d(yng);%c(yng)ַ;%f(yng)ξȵȵȡȵR

%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’)ַyݔĻС

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݋ģ0ʾ߉݋ٵ

1)P(gun)ϵ_(d)ʽ

_(d)ʽĔ(sh)ֵֻܞ1(ʾ)0(ʾ)

(dng)P(gun)ϵı_(d)Ǟĕrõ1 9>8@ģԱ_(d)ʽĔ(sh)ֵ1;

2)߉݋_(d)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_(d)ʽ

_(d)ʽ1 ?_(d)ʽ2 _(d)ʽ3

עǮ(dng)0rDZ_(d)ʽ2Ĕ(sh)ֵ(dng)0ǾDZ_(d)ʽ2Ĕ(sh)ֵ

ԇEǰٺ

5)switchZ䣺

a)һҪע break ͛]breakIJe(34)ăɂӣ]breakrֻҪһcaseƥˣʣµĶҪ(zh)breaktֱswicheZ

b)switchֻԺbreakһãԺcontinue

1)Nѭh(hun)Y(ji)(gu)

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

b)forѭh(hun)(dng)бǃɂ̖ǧfҪӛ

c)ĕrһҪעѭh(hun)һҪнY(ji)ėltѭh(hun)

d) do-while()ѭh(hun)һwhile();ķ̖һ܉G((dng)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)ѭh(hun)_ʼȻДѭh(hun)lM(jn)һ݆ѭh(hun)

3)Ƕѭh(hun)

ѭh(hun)߀ѭh(hun)@N^(f)sҪһһһһĵ`Ӌ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)У(dng)˺(sh)addabĔ(sh)ֵo{(dio)ú(sh)򕺕rДȴؔ(sh)ֵ(dng)?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(dng)׃;*ȡַpĔ(sh)ֵ

pǮ(dng)ַʹá

*p++ (*p)++֮gIJee}ĿкҪ

*p++ ַ׃

(*p)++ ǔ(sh)ֵҪ׃

x(ԇc)

(sh)MʾһԪصĵַ(sh)MԼӣǵַ(˺ܶ)

(sh)ʾԓ(sh)ڵַ

ַʾһַĵַ

1һS(sh)MҪ

a[10]@(sh)MӑՓ

1aʾ(sh)MǵһԪصĵַҲԪa[10]ĵַ

2aǵַֻҪF(xin)a++a=a+2xֵĶe`ġ

3aһS(sh)MָҲfa+1һС

a[3][3]ӑՓ

1aʾ(sh)MǵһԪصĵַҲԪa[10]ĵַ

2aǵַֻҪF(xin)a++a=a+2xֵĶe`ġ

3aǶS(sh)MָҲfa+1һС

4a[0]a[1]a[2]ҲǵַԌM(jn)xֵͬrָᘣa[0]+1a[1]+1a[2]+1һ

5עaa[0] a[1]a[2]DzͬĻDzͬġǰһԪһԪ

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)҂֪ǵһеĵһԪһУô@a[0][1]Ԫ1

*(a[1]+2)҂֪ǵڶеĵһԪСô@a[1][2]Ԫ6

һӛֻҪǶS(sh)M}Ŀһnjϵĸʽȥ}Ŀ@ӕ^

(sh)MijʼһSͶSһSԲSڶһҪ

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

S(sh)Mеָ

int a[1][2];

aF(xin)ھһָa+1һД(sh)MԪء (*)p[2]ָ

a[0]a[1]F(xin)ھһָᘡa[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!

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