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r(sh)g2024-09-23 16:43:48 ԇPԇ ҪͶ
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ҕУйPԇ}

ҕУйPԇ}

ҕУйPԇ}

1, 10,10,4,4Ă(g)24c(din)Ӌ?

(10*10-4)/4=24

2ı_ʽ32Cgh(hun)ăr(ji)ֵ()

a(li){}b(li);(li)c{˽ˣinti#pragma(4);j;k;char[64];L(chng)char*p#pragmapack()};(li)d{˽ˣinti#pragma(1);?;k;̿[64L(chng);char*p#pragmapack()};Ҫ(o(w)Ч){printf(“%d\n”sizeof(a));printf(“%d\n”С(b)l);printf(“%d\n”С(c)l);printf(“%d\n”sizeof(d));0;}1,4,84824,4,82,84bc4,4,84,82?1,4,82,82

3ij\32λCϵĽY()

#pragma(4)structinfo_t{o(w)ַ̖汾;o(w)ַ̖;o(w)ַ̖͔Uչ;o(w)ַ̖;o(w)ַ̖ӛ;o(w)ַ̖Чd;o(w)̖Ķ;unsignedintĕr(sh)g;unsignedintssrc;};(hu )info_u{o(w)ַ̖汾;o(w)ַ̖;o(w)ַ̖͔Uչ;o(w)ַ̖;o(w)ַ̖ӛ;o(w)ַ̖Чd;o(w)̖Ķ;unsignedintĕr(sh)g;unsignedintssrc;};#pragma()intҪ(o(w)Ч){printf(“%d\n”sizeof(info_t));printf(“%d\n”sizeof(info_u));0;}a12b124c16d1612e161

4б_ʽĽYֵ()

#xval1(ab)a*b#xֵ2()a/b--#xval3(ab)+a%binta=1;intb=2c=3;d=3;e=5;Y=val2(ab)/val1(eb)+val3(cd)-2bcd20

5Ո(xi)³ݔ(5)

o(w)Чswap_1(intaintb){cc=a;a=b;b=cĻ؈;}swap_2(int&a&b){c;c=aa=bb=c;؈;}o(w)Чswap_3(**b){cc=*a*a=*b*b=c;؈;}Ҫ(o(w)Ч){a=100;intb=200;swap_1(ab);printf(“=%db=%d\n”һ);swap_2(ab);printf(“=%db=%d\n”һ);swap_3(&b);printf(“=%2b=%2\n”ab)0;}ݔ

=100b=200

=200b=100

=100b=200

6ijǷІ(wn)}І(wn)}Ոؘa(5)

o(w)Чtest_type(bconstchar*pֹf)t(p)t(f)޸£

o(w)Чtest_type(bconstchar*pֹf)t(p)t(f-1e-10f<1e-10)7ՈעijκɆ(wn)(5)

ğo(w)Чtest_mem(){ַ*p=µchar[64];pp=null;؈;}޸Ąh[]p;pַָMĿgԭ(li)ĴaHHጷŵָָgúͿgÛ](mi)ጷ܌ƒȴp

Նһ(g)µČȴgͬr(sh)h֏µ[]һMăȴgʹ[]

8ijκɆ(wn)Ոע

ַ*getmem()o(w)Чtest_get_mem(){ַ*p=getmem();printf(p);;}getmemܵpһ(g)ֲ׃ڶїϕr(sh)\їăݕ(hu )Ԅ(dng)ጷֵ@ܕ(hu )ɞһ(g)I(lng)ָ(hu )һ(g)벻ĽY

9Ո(xi)strcpyĺmemcpyą^e(5)

strcpymemcpyǘ˜c캯c(din)

strcpyĸṩַHstrcpyַַؐHǃҲַY

strcpyԭǣchar*strcpy(ַ*destconstchar*src)

memcpyṩһăȴҪƵmemcpyăݛ](mi)˶Ŷˇ

memcpyԭ͞飺o(w)Чmemcpy(void*desto(w)Ч*srcsize_tӋ);

strcpymemcpyҪF(g)ą^e

1ƵăDzͬstrcpyֻ܏ַmemcpyĿɏκ΃һ(g)ַMYȵ

2ԲͬķʽƵstrcpyIJҪָL(chng)˱ƵһַYַ“\0”ֱmemcpyĻAǰ(g)Q˸L(chng)

3ڲͬĿַͨstrcpy(li)͵ĔҪƕr(sh)һʹõmemcpy

10Ո(xi)гݔ

AA{A(){printf(“ՈҵĻ()\n”);}̓MA(){printf(“?()\n”);}̓Mo(w)Чsayhello(){printf(“û\n”);}ğo(w)Чsayworld(){printf(“\”);}};(li)A{(){printf(“ҁ(li)()\n“);}̓M(){printf(”?()\n“);}o(w)Чsayhello();ğo(w)Чsayworld();};o(w)Ч::صsayhello(){printf(“\n”);}o(w)Ч::sayworld(){printf(“\n”);}Ҫ(o(w)Ч){*b1=»;*b2=µ*d=µ;b1->sayhello();b1->sayworld();b2->sayhello();b2->sayworld();d->sayhello();d->sayworld()hdhb2b1h;=null;b2=;b1=null;0;}ݔ

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11xIJEoY

(li)bclass{bclass(intij)int(l )Ȥ̓M();һlclass??bclass{lclass(intijk)bclass(ij)(l )Ȥ()˽ˣz;};Ҫ(o(w)Ч){lclassobj(2,4,10);bclassp1=obj;cout<<<<<< <

12Μplķȴ(mallocnew)ƒȴƬ?(10)

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2015Уаl(f)̎ھ(xin)Pԇ}11-20

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