From 4e33e8f104fb0ea02aa4d28865947377190a896e Mon Sep 17 00:00:00 2001 From: flykhan Date: Tue, 18 Jul 2023 19:06:37 +0800 Subject: [PATCH] =?UTF-8?q?day12:=20=E5=AD=97=E7=AC=A6=E4=B8=B2=E5=A4=84?= =?UTF-8?q?=E7=90=86=E5=87=BD=E6=95=B0=EF=BC=8Cconst=EF=BC=8C=E7=BB=93?= =?UTF-8?q?=E6=9E=84=E4=BD=93?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.md | 2 ++ day12/a.out | Bin 0 -> 8704 bytes day12/d10.c | 42 +++++++++++++++++++++++++++++++++++ day12/d10_2.c | 16 ++++++++++++++ day12/d11.c | 25 +++++++++++++++++++++ day12/d12.c | 26 ++++++++++++++++++++++ day12/d13.c | 26 ++++++++++++++++++++++ day12/d14.c | 25 +++++++++++++++++++++ day12/d15.c | 27 +++++++++++++++++++++++ day12/d16.c | 33 ++++++++++++++++++++++++++++ day12/d17.c | 20 +++++++++++++++++ day12/d18.c | 44 +++++++++++++++++++++++++++++++++++++ day12/d19.c | 37 +++++++++++++++++++++++++++++++ day12/d20.c | 23 ++++++++++++++++++++ day12/d20_2.c | 24 ++++++++++++++++++++ day12/d21.c | 31 ++++++++++++++++++++++++++ day12/d9.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++ 17 files changed, 460 insertions(+) create mode 100755 day12/a.out create mode 100644 day12/d10.c create mode 100644 day12/d10_2.c create mode 100644 day12/d11.c create mode 100644 day12/d12.c create mode 100644 day12/d13.c create mode 100644 day12/d14.c create mode 100644 day12/d15.c create mode 100644 day12/d16.c create mode 100644 day12/d17.c create mode 100644 day12/d18.c create mode 100644 day12/d19.c create mode 100644 day12/d20.c create mode 100644 day12/d20_2.c create mode 100644 day12/d21.c create mode 100644 day12/d9.c diff --git a/README.md b/README.md index 9cf9f9f..28f80e1 100644 --- a/README.md +++ b/README.md @@ -15,3 +15,5 @@ #### day10: 数组指针，函数与指针，动态内存申请 #### day11: 动态内存申请，内存泄漏，字符串处理函数 + +#### day12: 字符串处理函数，const，结构体 diff --git a/day12/a.out b/day12/a.out new file mode 100755 index 0000000000000000000000000000000000000000..ef9f2517b2bb364ede3b2a4655b31a7f3e68e1c5 GIT binary patch literal 8704 zcmeHMeQaA-6+gD~;eI)8*RE+htroN>+sLaE(%^0?ea=VwQj&h8$zX!?#fhE7;E%|D zE=m7@LbeL8>!?^k0clb-#>WH_MS`hFXh~^lI`}6QDymc@24YjXu`OexM1s|vbKgDA z^Nk}_ApYyI{LVeUd(OG%e!hF}`$~J~Ubo8yOm6rTkThMP3&?%~=$nNou@I~P9k#*) zP=!b({&kT<+)goHkgl0~rJe_Q1^z>B8wj~|kzoFS4Pyy5afHOFyhYMw(&m?C0n7mc zBA@IiR=-b($ooZtIme;Pc-W3ava6GJb<&RctPG4f*N^H({~qbD$E~A8vQ7-z#B-68 zF43Xatth1@tA&VM7YXJ~HVn+!?l9U>oOerpsn{*cTdrN^W&M~-5q2cv1IZgYGE z;d`XKP}46`)b~6V2&nb<69XDX)Q(I62VNZNm|5q*sb83a4%|8KjETQ_jZ>AsSQP-{ zscEZnZV)YuiOb$gY-#ht&KFRnu>D1R)@;==Me+z`-g>QowEepzQ;4@_h5SvDDYRSD zLVlWL3hCB)A-AABbOvQX4R3ekuN^h=e=#QhI)A9AV`jP^XN)m(alVS!%*&NJ%>57z zKNzan+6HjpAXcc?s5g)q6AL~g|N5~l7swS=V{P9QWfWdRxyyhj@6L=r)^6m3eGyvv) zE2Li=r`qR@yx+!Nc4CLH<1p_O%!pZN3%Yj(9z=7NPWh$MDac=$van4>By*kU$u4!k zE_K1yBd2KGwP563M*c7rfjL;jRof{Fx>qv9{sYB5z1^>RN14e#k z?&n2O_mcb~%b1?D(-_Lk+%uRKk-v(~i~S$|O!)C|z7XyW_jI1#?yC-9XP&MnexxIR zyCZ+S^C4e`o&9&iw5*^iWv;M`PlW%h>f+?oAr_pX&>M zKHL{R8a6MTSsX9#<9rbQl`fB&rtooAo1nk-T*u$UL_7Q?f2b&dA7~4*YA?)*?bhoal z@&sL2w8)Dh{B?{uh8$Xa{%^Qje6`Pd+I@l36)nEHXDSU}@MM+Y3r$pa`Sgr06!rzf zzPc7)0QFG6#pe|x^(Sb49{o7iEpmB}?zOi_{t^NAaajMEhzYK3{FIMes__$H`iGp5k*J=l|nQAx)~2Zk<^1%x8FPnfALx z7u-5ASSg+WpO&2V`$V-igAI~1qYb4X+|Cj4JH?jl^9kX!e!Gq@qkXM9@995A@VUtbRpt9F^)<7ROI1UIjePO7Uta*FPQ{)!eV8`YV9PM=8FtIF3s3RlxJ96kiSf zW!l{XYv6oY+*iE6DfLqWJU>fuKa9$GTZ*qO-anM$>tMF5{(Z&yUaG$yc%GNy8-R{G zDtX|3yl*LoZv;N?I&C~O%jG;S#Wz8yEWR1&_@?-dpiJ4NfC3s)62 zep>h3;DdRkU&u4zL1kUlB(AQvw5N8#Vw}8A91-}^_B<~A@cNCSpp*D?!P0*DKH}x- zwOoCFEc~p4X|Il{MfxQs%e4b(l=J@^VS3+^@$d)XXKBCxN$T@^M2PtKyGSe@pOshv zSDEp!1@U#*{&YJ)#OwVd0vAxpV>jY~62un1CGe%=>IuaC_|{X$)po?!!P0rxFYu)W zSj*tgN&o72K8JX@IDd-xTK6W?9&zkQdPWo#5{7dT7Jq?jKLs9}eC_r4H^@vlwR6l`b^sfv5W!BZf zjFq)=Lqi%}(d}>THak0x^q3|@W0}}+JZr@=rj;}Y6X{eeiyG0iIh;rjL=tAyN@ucW zBsT_w>Evi4X2qh~CwJ~@Dz9V?#Zz%JlF3BI%~;CHjN|oRBpEZKxny!2O&pSmnpTNw zw6Q^ix3@do)o!*QXv6sIU^!i45(TsEi38!Tj#kui|JG+0oNwE;dw8S1UDBPh=p07n`wY z#EQsEP{mBW3RSbo(!LVKAWH5>u>-Pcb0m_AQV|^oQ7alxnYnBXE4>&mRa#!Ws=f!Z zS?O9_!kYV!nccFZTN9CNR`fE~gqxYF$RnYof}mx`lU8H^xs|c`2&eE~CzcrnEtR%n zTDYa7-ii!MX*iYB26Az{Fpoz;BWWa(9RV#moPp3)*6Z0~$M1%}v zYBXViCaSDqQX5XAXvN0xNrMiR(xNN0*oYivBT;n1l5J{_H`{{KUl>F+EGCkS4`K{y zi`*kZ{iv@k`M``i9 zOF&4A4_@yWX~2Zjp7)QIbhwQbC0Fg+5WkIkcP@X@tqaXb32^+C0)^uFM~ZL&6LeN# z`wMOzB|6s#27J+7g(B5mJ!d?Q7@cLvt(!O8fWKX_S`)3iOxTt-Jc>f(Dr$~HGwI#bOP7}}L-)YbL^nPhC?oJ&Bewk)| zRsiyjLehsgp$Y$!R~F<(&Zd4C&{_8cd>VLO)ZV1h8NKko|- zX{hQ`tWNSEKv>WTVw&y6=U7J`+cRH_d0e(b4I1SI*lJdknTl94_MP@8Wc*{Y~h5JP|JjxT(7Dah7DcFAi-HW>s literal 0 HcmV?d00001 diff --git a/day12/d10.c b/day12/d10.c new file mode 100644 index 0000000..9806f3d --- /dev/null +++ b/day12/d10.c @@ -0,0 +1,42 @@ +#include +#include +#include + +struct LRC +{ + int lineNo; // 行号 + char show_time[10]; // 歌词时间 + char content[128]; // 歌词内容 +} line1, line2; // 第一行歌词，第二行歌词 + +#define slrc struct LRC // 定义别名 + +int main() +{ + // line1.content = "天青色等烟雨，而我在等你"; // 错误，不能这样赋值，因为 content 是数组，不能直接赋值 + // 正确写法是使用 strcpy 函数 + + line1.lineNo = 1; + // 使用 strcpy 函数，将内容复制到结构体变量中成员的数组空间中 + strcpy(line1.show_time, "00:00:01"); + strcpy(line1.content, "天青色等烟雨，而我在等你"); + line2.lineNo = 2; + // 使用 strcat 也能达成同样的效果 + strcat(line2.show_time, "00:00:06"); + strcat(line2.content, "炊烟袅袅升起，隔江千万里"); + + printf("%d %s %s\n", line1.lineNo, line1.show_time, line1.content); + printf("%d %s %s\n", line2.lineNo, line2.show_time, line2.content); + + // 创建第三行 + slrc line3 = {.lineNo = 3, .show_time = "00:00:11", .content = "在瓶底书汉隶仿前朝的飘逸"}; + printf("%d %s %s\n", line3.lineNo, line3.show_time, line3.content); + + slrc line4 = line3; // 结构体变量之间可以直接赋值 + line4.lineNo = 4; + // line4.content = "加个字"; // 错误，不能这样赋值，因为 content 是数组，不能直接赋值 + strcat(line4.content, "加个字"); + printf("%d %s %s\n", line4.lineNo, line4.show_time, line4.content); + + return 0; +} \ No newline at end of file diff --git a/day12/d10_2.c b/day12/d10_2.c new file mode 100644 index 0000000..c8c5455 --- /dev/null +++ b/day12/d10_2.c @@ -0,0 +1,16 @@ +#include +#include + +struct +{ + char name[20]; + float score; +} c1, c2, c3; + +int main() +{ + strcpy(c1.name, "张三"); + c1.score = 99.5f; + printf("姓名：%s 成绩：%.2f\n", c1.name, c1.score); + return 0; +} \ No newline at end of file diff --git a/day12/d11.c b/day12/d11.c new file mode 100644 index 0000000..8272412 --- /dev/null +++ b/day12/d11.c @@ -0,0 +1,25 @@ +// 定义结构体时指定新类型名 +#include +#include + +typedef struct lrc_s +{ + unsigned int num; // 时间 + char content[128]; // 歌词 +} LRC; // LRC 是新类型名 + +int main() +{ + struct lrc_s line1; + LRC line2 = { + .num = 2, + .content = "炊烟袅袅升起，隔江千万里"}; // LRC 是新类型名，可以直接使用 + + line1.num = 1; + strcpy(line1.content, "天青色等烟雨，而我在等你"); + + printf("%d %s\n", line1.num, line1.content); + printf("%d %s\n", line2.num, line2.content); + + return 0; +} \ No newline at end of file diff --git a/day12/d12.c b/day12/d12.c new file mode 100644 index 0000000..371c15c --- /dev/null +++ b/day12/d12.c @@ -0,0 +1,26 @@ +#include +#include + +typedef struct stu_s +{ + unsigned short sid; + // char name[32] = ""; // 不能在定义时初始化，因为结构体是类型，不是变量 + char name[32]; + unsigned short hight; + float weight; +} STU_INFO; + +int main() +{ + for (int i = 0; i < 3; i++) + { + // struct stu_s stu; // 重复定义，不会报错，但是不建议这么做 + STU_INFO stu; + printf("请输入学号 姓名 身高 体重："); + // %hu 是 unsigned short 的格式化输出 + scanf("%hu %s %hu %f", &stu.sid, stu.name, &stu.hight, &stu.weight); + printf("第%d位-->学号：%hu 姓名：%s 身高：%hu 体重：%.2f\n", i + 1, stu.sid, stu.name, stu.hight, stu.weight); + } + + return 0; +} \ No newline at end of file diff --git a/day12/d13.c b/day12/d13.c new file mode 100644 index 0000000..a88b143 --- /dev/null +++ b/day12/d13.c @@ -0,0 +1,26 @@ +#include +#include + +typedef struct stu_s +{ + unsigned short sid; + char name[32]; + unsigned short hight; + float weight; +} STU_INFO; + +int main() +{ + STU_INFO stu; + for (int i = 0; i < 3; i++) + { + // 结构体清空数据 + memset(&stu, 0, sizeof(STU_INFO)); // 清空结构体 + printf("请输入学号 姓名 身高 体重："); + // %h 是短整型，%u 是无符号整型 + scanf("%hu %s %hu %f", &stu.sid, stu.name, &stu.hight, &stu.weight); + printf("第%d位-->学号：%hu 姓名：%s 身高：%hu 体重：%.2f\n", i + 1, stu.sid, stu.name, stu.hight, stu.weight); + } + + return 0; +} \ No newline at end of file diff --git a/day12/d14.c b/day12/d14.c new file mode 100644 index 0000000..a9683e8 --- /dev/null +++ b/day12/d14.c @@ -0,0 +1,25 @@ +// 结构体的成员是指针 +// 如果结构体中的成员是指针时，可以直接赋值(常量区的地址)或者可以从堆区申请空间后赋值 + +#include +#include + +struct Data1 +{ + int n; + char *name; +}; + +int main() +{ + struct Data1 d1 = {1, "lucy"}; + printf("%d %s\n", d1.n, d1.name); + + struct Data1 d2; + d2.n = 100; + // 字符数组名不能直接赋值，只能使用 strcpy 函数，因为数组名是常量 + d2.name = "jack"; // 指针变量可以指向其它内容，可以修改 + printf("%d %s\n", d2.n, d2.name); + + return 0; +} \ No newline at end of file diff --git a/day12/d15.c b/day12/d15.c new file mode 100644 index 0000000..1e6bbcc --- /dev/null +++ b/day12/d15.c @@ -0,0 +1,27 @@ +// 结构体的成员是指针 +// 如果结构体中的成员是指针时，可以直接赋值(常量区的地址)或者可以从堆区申请空间后赋值 + +#include +#include + +struct Data1 +{ + int n; + char *name; +}; + +int main() +{ + struct Data1 d1 = {1, "lucy"}; + printf("%d %s\n", d1.n, d1.name); + + struct Data1 d2; + d2.n = 100; + d2.name = (char *)malloc(32); // 申请堆区空间 + // d2.name = "lucy"; // 导致内存泄漏，因为指针变量指向了常量区的地址，而不是堆区的地址 + strcpy(d2.name, "lucy"); // 修改堆区的内容 + printf("%d %s\n", d2.n, d2.name); + + free(d2.name); // 释放堆区空间，否则会导致内存泄漏 + return 0; +} \ No newline at end of file diff --git a/day12/d16.c b/day12/d16.c new file mode 100644 index 0000000..784c19f --- /dev/null +++ b/day12/d16.c @@ -0,0 +1,33 @@ +#include +#include + +struct lrc_time +{ + char hour; + char minute; + char second; +}; + +// 嵌套结构体，需要逐层赋值 +typedef struct lrc +{ + struct lrc_time start_time; // 开始时间 + char *content; +} LRC; + +int main() +{ + // 定义结构体变量并初始化值 + LRC line1 = {{0, 0, 2}, "天青色等烟雨，而我在等你"}; + + LRC line2; + line2.start_time.hour = 0; + line2.start_time.minute = 1; + line2.start_time.second = 15; + line2.content = "炊烟袅袅升起，隔江千万里"; + + printf("%02d:%02d:%02d %s\n", line1.start_time.hour, line1.start_time.minute, line1.start_time.second, line1.content); + printf("%02d:%02d:%02d %s\n", line2.start_time.hour, line2.start_time.minute, line2.start_time.second, line2.content); + + return 0; +} \ No newline at end of file diff --git a/day12/d17.c b/day12/d17.c new file mode 100644 index 0000000..dd4f2c9 --- /dev/null +++ b/day12/d17.c @@ -0,0 +1,20 @@ +#include +#include + +struct goods_s +{ + char name[30]; + float price; +}; + +int main() +{ + struct goods_s g1 = {"华为手机", 6500}; + struct goods_s g2 = g1; // 两个相同结构的变量可以直接赋值(浅拷贝: 复制第一层内存空间) + strcpy(g2.name, "华为平板"); + g2.price = 9000.0f; + printf("商品名称：%s 价格：%.2f\n", g1.name, g1.price); + printf("商品名称：%s 价格：%.2f\n", g2.name, g2.price); + + return 0; +} \ No newline at end of file diff --git a/day12/d18.c b/day12/d18.c new file mode 100644 index 0000000..f7afce0 --- /dev/null +++ b/day12/d18.c @@ -0,0 +1,44 @@ +#include +#include + +struct user_s +{ + int uid; + char *name; +}; + +struct goods_s +{ + int gid; + float price; + char *name; +}; + +struct order_s +{ + struct user_s user; + struct goods_s goods; + float order_price; // 订单总价 + int num; // 购买数量 + int pay_status; // 支付状态 0:未支付 1:已支付 2:取消支付 +}; + +int main() +{ + struct user_s user1 = {1, "disen"}; + struct user_s user2 = {2, "lucy"}; + struct goods_s goods1 = {201, 1200.0f, "华为手表"}; + struct goods_s goods2 = {202, 225000.0f, "华为汽车"}; + struct order_s order1 = { + user1, + goods1, 1200.0f, 1, 1}; + struct order_s order2 = order1; + // order2.user.name = "小李子"; + // order2.goods.name = "华为汽车"; + + order2.user = user2; + order2.goods = goods2; + + printf("order1 %s 购买 %s 订单状态: %d\n", order1.user.name, order1.goods.name, order1.pay_status); + printf("order2 %s 购买 %s 订单状态: %d\n", order2.user.name, order2.goods.name, order2.pay_status); +} diff --git a/day12/d19.c b/day12/d19.c new file mode 100644 index 0000000..44c5a63 --- /dev/null +++ b/day12/d19.c @@ -0,0 +1,37 @@ +#include +#include +#include // sqrt 函数 + +// 键盘输入 2 个点的坐标，计算两点之间的距离 (欧氏距离，勾股定理) +// 还有一种距离叫 曼哈顿距离，两点之间的距离是两点在坐标系上的横纵坐标的距离之和 +// 欧式距离公式: d = sqrt((x1-x2)^2 + (y1-y2)^2) +// 曼哈顿距离公式: d = |x1-x2| + |y1-y2| +// gps 的距离使用的是曼哈顿距离 + +// 定义结构体 +struct Point +{ + int x; + int y; +}; + +int main() +{ + struct Point twoPoint[2]; + memset(&twoPoint[0], 0, sizeof(twoPoint)); + memset(&twoPoint[1], 0, sizeof(twoPoint)); + + for (int i = 0; i < 2; i++) + { + printf("请输入第%d个点的坐标: ", i + 1); + scanf("%d %d", &twoPoint[i].x, &twoPoint[i].y); + } + + // 计算两点之间的距离 + // sqrt 函数在 math.h 头文件中 + // pow 函数在 math.h 头文件中，求幂函数，pow(x, y) 求 x 的 y 次方 + float d1 = sqrt(pow(twoPoint[0].x - twoPoint[1].x, 2) + pow(twoPoint[0].y - twoPoint[1].y, 2)); + printf("两点之间的距离是: %.2f\n", d1); + + return 0; +} \ No newline at end of file diff --git a/day12/d20.c b/day12/d20.c new file mode 100644 index 0000000..db741d6 --- /dev/null +++ b/day12/d20.c @@ -0,0 +1,23 @@ +#include +#include + +struct POS +{ + int x; + int y; +}; + +int main() +{ + struct POS p1 = {0, 0}; + struct POS *p2 = &p1; // 结构体指针指向结构体变量 + // p2.x = 2; // 错误，结构体指针不能直接访问结构体变量的成员，需要使用 -> 运算符 + p2->x = 2; + p2->y = 2; + + printf("point1 x=%d, y=%d\n", p1.x, p1.y); + printf("point2 x=%d, y=%d\n", p2->x, p2->y); + // printf("point2 x=%d, y=%d\n", (*p2).x, (*p2).y); // *p2 也是一个结构体变量，可以使用 . 运算符访问成员 + + return 0; +} \ No newline at end of file diff --git a/day12/d20_2.c b/day12/d20_2.c new file mode 100644 index 0000000..06aea3b --- /dev/null +++ b/day12/d20_2.c @@ -0,0 +1,24 @@ +#include +#include +#include + +// 结构体存在堆区，结构体的成员也存在堆区 +struct POS +{ + int *x; + int *y; +}; + +int main() +{ + struct POS *p1 = malloc(sizeof(struct POS)); + p1->x = (int *)malloc(sizeof(int)); + p1->y = (int *)malloc(sizeof(int)); + + *(p1->x) = 20; + *(p1->y) = 30; + + printf("point1 x=%d, y=%d\n", *(p1->x), *((*p1).y)); + + return 0; +} \ No newline at end of file diff --git a/day12/d21.c b/day12/d21.c new file mode 100644 index 0000000..6f053aa --- /dev/null +++ b/day12/d21.c @@ -0,0 +1,31 @@ +// 浅拷贝 +#include +#include +#include + +struct POS +{ + int *x; + int *y; +}; + +int main() +{ + struct POS *p1 = malloc(sizeof(struct POS)); + p1->x = (int *)malloc(sizeof(int)); + p1->y = (int *)malloc(sizeof(int)); + *(p1->x) = 20; + *(p1->y) = 30; + printf("point1 x=%d,y=%d\n", *(p1->x), *(p1->y)); + + struct POS *p2 = malloc(sizeof(struct POS)); + memcpy(p2, p1, sizeof(struct POS)); // 浅拷贝,只拷贝了结构体本身，没有拷贝结构体成员 + *(p2->x) = 200; + printf("point2 x=%d,y=%d\n", *(p2->x), *(p2->y)); + printf("point1 x=%d,y=%d\n", *(p1->x), *(p1->y)); + free(p1->x); + free(p1->y); + free(p1); + free(p2); + return 0; +} \ No newline at end of file diff --git a/day12/d9.c b/day12/d9.c new file mode 100644 index 0000000..e7cfd4b --- /dev/null +++ b/day12/d9.c @@ -0,0 +1,59 @@ +// 结构体，也是构造类型之一，由至少一个基本数据类型或构造类型组成的一种数据类型 +// 结构体的成员可以是基本数据类型或构造类型 +#include +#include + +/* + // 语法1: 只声明结构体 + struct 结构体类型的名称 + { + // 声明成员变量，成员变量不要初始化（值） + 成员类型1 成员名称1; + 成员类型2 成员名称2; + ... 成员类型n 成员名称n; + }; + + // 语法2: 声明结构体时，同时声明结构体类型的变量 + struct 结构体类型的名称 + { + // 声明成员变量，成员变量不要初始化（值） + 成员类型1 成员名称1; + 成员类型2 成员名称2; + ... 成员类型n 成员名称n; + } 结构体类型的变量1, 结构体类型的变量2, ... 结构体类型的变量n; + + // 语法3: 一次性声明结构体 + struct + { + // 声明成员变量 + + } 变量名; +*/ + +struct STU +{ + unsigned int sid; // 存放学号 + char name[32]; // 存放姓名 + char phone[12]; // 存放手机号，12个字节，11个数字，最后一个字节存放'\0' +}; + +#define sstu struct STU // 定义别名 + +int main() +{ + // 定义 STU 类型的变量，存放张三这个学生，学号为1001，手机号为17791692095 + // 结构体变量在初始化时，按成员的顺序和数据类型依次赋值 + sstu s1 = {1001, "张三", "17791692095"}; + sstu s3 = {1003, "王五", "17791692097"}; + // 存其他学生的信息 + struct STU s2; + s2.sid = 1002; + strcpy(s2.name, "李四"); + strcpy(s2.phone, "17791692096"); + + printf("sid: %u name: %s phone: %s\n", s1.sid, s1.name, s1.phone); + printf("sid: %u name: %s phone: %s\n", s2.sid, s2.name, s2.phone); + printf("sid: %u name: %s phone: %s\n", s3.sid, s3.name, s3.phone); + + return 0; +} \ No newline at end of file