标签：char code name int 2024 str com

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 设计函数，三种方法赋值结构体
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

include <string.h>

struct studentinfo
{
char name[256];
long number;
unsigned int age;
char sex[20];
};

int main(void)
{
struct studentinfo data1 = {"xiaoming", 201900318038, 18, "man"};
struct studentinfo data2 =
{
.sex = "women",
.age = 20,
.number = 201900318025,
.name = {"xiaomei"}};
struct studentinfo data3;
data3.age = 18;
data3.number = 165165124;
strcpy(data3.name, "xiaobai");
printf("data1 name is %s\n", data1.name);
printf("data2 name is %s\n", data2.name);
printf("data3 name is %s\n", data3.name);
}

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 设计函数，判断大小端存储
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

union
{
int a;
char b;
} data;
int main()

{
data.a = 0x12345678;
if (0x12 == data.b)
printf("Big-endian\n");
else
printf("little-endian\n");
return 0;
}*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 判断静态局部变量和静态全局变量在函数中的改变。
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

static int y;
func1()
{
static int x = 0;
x++;
printf("x=%d\n", x);
}
func2()
{
y = 0;
y++;
}
int main()
{
int i = 0;
for (i = 0; i < 2; i++)
{
func1();
func2();
}
printf("y=%d\n", y);
return;
}
*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 用宏定义交换两个变量数值
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

define SWAP(x, y) \

{                    \
    (x) = (x) + (y); \
    (y) = (x) - (y); \
    (x) = (x) - (y); \
}

int main()
{
int a, b;
printf("请输入两个数进行交换\n");
scanf("%d%d", &a, &b);
change(a, b);
printf("%d,%d\n", a, b);
return 0;
}
*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 用宏输入两个参数并返回较小的的一个
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

define MIN(x, y) ((x) < (y)) ? (x) : (y)

int main()
{
int a, b;
printf("请输入两个数值进行比较\n");
scanf("%d%d", &a, &b);
printf("MIN number =%d\n", MIN(a, b));

return 0;

}
*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 取10~100之间的素数
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

int main()
{
int i, j, counter = 0;
for (i = 11; i <= 100; i += 2)
{
for (j = 2; j < i; j++)
if (i % j == 0)
break;
if (j >= i)
{
printf(" %d", i);
counter++;
if (counter % 5 == 0)
printf("\n");
}
}
}
*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 计算一个字节有多少位为1
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

int main()
{
unsigned char a;
scanf("%c", &a);
int number = 0;
for (int i = 0; i < 8; i++)
{
if ((1 << i) & a)
number++;
}
printf("%d\n", number);
return 0;
}****/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 用宏定义写出交换两个变量数值的宏定义
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

define SWAP(x, y) \

(x) = (x) + (y);   \
(y) = ((x) - (y)); \
(x) + ((x) - (y));*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 计算字符串中最大连续的字符个数
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

int func(char *str)
{

int cont = 1;
int max = 0;
int i = 0;
while (str[i] != '\0')
{
if (str[i] == str[i + 1])
{
cont++;
}
else
{
max = (max > cont) ? (max) : (cont);
cont = 1;
}
i++;
}
return max;
}
int main()
{
printf("max=%d\n", func("aaabbbbdddddddssccd"));
return 0;
}***/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 实现一个函数把str_src中的内容拷贝到str_dest中，并在主函数中调用。
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

char *str_cpy(const char *str_src, char *str_dest)
{
int i = 0;
while (str_src[i] != '\0')
{
str_dest[i] = str_src[i];
i++;
}
str_dest[i] = '\0';
return str_dest;
}

int main()
{
char buf[128] = {0};
str_cpy("xiao ming", buf);
printf("buf =%s\n", buf);
}*/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 设计一个函数，实现比较两个字符串是否相等，相等返回1，不相等返回0
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

int str_compare(const char *str1, const char *str2)
{

while (*str1 == *str2)
{
    if (*str1 == *str2 != '\0')

        return 1;
}
return 0;

}
int main()
{
char a[5] = {"abcde"};
char b[5] = {"abcde"};
printf("%d\n", str_compare(a, b));
return 0;
}***/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 用递归实现n！
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include <stdio.h>

int func(int n)
{
if (1 == n)
return 1;
else
return n * func(n - 1);
}
int main()
{
int x;
scanf("%d", &x);
printf("n!=%d\n", func(x));
return 0;
}***/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 从1到n，每数到m的倍数输出
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include<stdio.h>

void func(int m,int n)

{
for (int i=1;i<=n;i++)
{
if (i%m!=0)
{
continue;
}
else
{
printf("%d\n",i);
}
i++;
}
}

int main()
{
int a=2,b=10;
func(a,b);
return 0;
}
/
/******************************************************************
*

file name: mystring.c
author : [email protected]
date : 2024/04/17
function : 该案例是掌握进行模块化编程思想，以及封装函数接口流程
note : None
CopyRight (c) 2023-2024 [email protected] All Right Reseverd

include "mystring.h"

/
/****************************************************************
*

name : CalSubStrMaxCnt
function : 计算一个字符串中最大的重复子串的字符的数量
argument :

 		@str:需要查找的字符串的地址

retval : 函数调用成功则返回最大子串的字符数量
author : [email protected]
date : 2024/04/17
note : None

int CalSubStrMaxCnt(const char *str)
{
if (NULL == str)
{
printf("argument is invaild\n");
return -1;
}

int cnt = 1; // 计数器用于记录相同字符的数量,都不连续则返回值为1
int max = 0;

// 循环判断字符，当遇到'\0'则表达到达字符串末尾，此时可以终止循环
while (*str != '\0')
{

    // 判断当前的字符和下一个字符的ASCII是否相同
    if (*str == *(str + 1))
    {
        cnt++;
    }
    else
    {
        max = (max < cnt) ? cnt : max;
        cnt = 1;
    }

    str++;
}

// 当终止循环时，则把最大值返回
return max;

}
/
/****************************************************************
*

name : MyStrcpy
function : 实现字符串的拷贝（不调用库函数的情况下），是笔试题
argument :

 		@str_src :需要拷贝字符串的地址

 		@str_dest:待拷贝的目标空间的地址

retval : 函数调用成功则返回目标空间的地址
author : [email protected]
date : 2024/04/17
note : None
*****************************************************************/
char *MyStrcpy(const char *str_src, char str_dest)
{
// 循环的把str_src字符串的每个字符进行赋值，赋值到str_dest地址下
while (str_src != '\0')
{
// 如果没有到达字符串末尾，则把字符串的字符按照顺序依次赋值
*str_dest = *str_src++;
```
 str_dest++;
```
}

// 包含了'\0'
*str_dest = '\0';

return str_dest;
}

/*******************************************************************
*

name : MyStrcmp
function : 实现字符串的比较（不调用库函数的情况下），是笔试题
argument :

 		@str1 :需要比较的第一个字符串的地址

 		@str2 :需要比较的第二个字符串的地址

retval : 两个字符串相同则返回0，如果不相同则返回1
author : [email protected]
date : 2024/04/17
note : None
*****************************************************************/
int MyStrcmp(const char *str1, const char *str2)
{

// 循环的比较两个字符串的字符ASCII码是否相等
while (*str1++ == str2++)
{
if (str1 == '\0' && *str2 == '\0')
{
return 1;
}
}

return 0;
}

/*******************************************************************
*

name : StrRightShift
function : 实现把一个char组成的字符串循环右移n个。是笔试题
argument :

 		@str  :需要右移的字符串的地址

```
 		@n    :需要右移的位数
```
retval : 调用成功返回移位的字符串的首地址
author : [email protected]
date : 2024/04/17
note : 原来是"abcdefghi" 如果n=2，移位后应该是"hiabcdefg"
*****************************************************************/
char *StrRightShift(const char *str, int n)
{
// 计算字符的实际长度
int cnt = strlen(str);

// printf("string cnt = %d\n",cnt);

// 给字符串的字符申请内存
char *p = (char *)malloc(cnt);

// 把输入的字符串中的字符备份到堆内存
strcpy(p, str);

char temp = 0; // 存储要移位的字符

// 循环进行字符的移位
for (int i = 0; i < n; ++i)
{
temp = *(p + cnt - 1);
printf("temp = %c\n", temp);
```
 for (int j = cnt - 2; j >= 0; j--)
 {
     *(p + j + 1) = *(p + j);
 }

 *p = temp;
```
}

// 输出移位后的字符串
printf("string is %s\n", str);
printf("string is %s\n", p);

return p;
}

/********************************************************************
*

name : StrReverse
function : 实现将一个输入的字符串进行逆序是笔试题
argument :

 		@str  :需要逆序的字符串的地址

retval : 调用成功返回逆序之后的字符串的首地址
author : [email protected]
date : 2024/04/17
note : 原来是"helloworld" 逆序后应该是"dlrowolleh"
*****************************************************************/
char *StrReverse(const char *str)
{

char *p = (char *)malloc(128);

int cnt = strlen(str);

for (int i = 0; i < cnt; ++i)
{
*(p + i) = *((str + cnt - 1) - i);
}

return p;
}

/********************************************************************
*

name : StrReverse
function : 递归思想实现将一个输入的字符串的实际长度是笔试题
argument :

 		@str  :需要逆序输出的字符串的地址

retval : 返回计算的字符数量，不包括'\0'
author : [email protected]
date : 2024/04/17
note : None
******************************************************************/
int MyStrlen(const char *ptr)
{
// 写好终止条件，遇到'\0'结束递归，'\0'不计算在内
if ('\0' == *ptr)
{
return 0;
}
else
{
return MyStrlen(ptr + 1) + 1;
}
}

/********************************************************************
*

name : StrReverse
function : 实现将一个输入的字符串进行逆序输出是笔试题
argument :

  		@str  :需要逆序输出的字符串的地址

retval : None
author : [email protected]
date : 2024/04/17
note : 原来是"helloworld" 逆序后应该是"dlrowolleh"

void StrReversePrint(char *ptr)
{
//写好终止条件，防止死循环出现，导致函数频繁调用出现栈溢出现象
if ('\0' == *ptr)
{
return;
}

StrReversePrint(ptr+1);

printf("%c",*ptr);

}**/

/*******************************************************************
*

file name: main.c
author : [email protected]
date : 2024/04/07
function : 输入一个证书输出其二进制位中1的个数
note : None

// 2.统计二进制的1的个数

include <stdio.h>

int count_num_of_1(int n)
{
int count = 0;
while (n)
{
if ((n % 2) == 1)
{
count++;
}
n /= 2;
}
return count;
}
int main()
{
int num = 0, n;
scanf("%d", &num);
n = count_num_of_1(num);
printf("%d\n", n);
}
***/

标签：char,code,name,int,2024,str,com
From： https://www.cnblogs.com/zeratul/p/18147813

code

include <stdio.h>

include <string.h>

include <stdio.h>

include <stdio.h>

include <stdio.h>

define SWAP(x, y) \

include <stdio.h>

define MIN(x, y) ((x) < (y)) ? (x) : (y)

include <stdio.h>

include <stdio.h>

include <stdio.h>

define SWAP(x, y) \

include <stdio.h>

include <stdio.h>

include <stdio.h>

include <stdio.h>

include<stdio.h>

include "mystring.h"

include <stdio.h>

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