C语言从青铜到王者——数组详解【一维数组、二维数组、字符数组】

//公众号：C语言中文社区
#include<stdio.h>
#define N 9
int main(void) {
    int arr[N];
    int i;
    for (i = 0; i < N; i++)
    {
        arr[i] = i + 1;
        printf("arr[%d]=%d\t", i, arr[i]);
        if (0 == (i+1)%3)
        {
            printf("\n");
        }
    }
    return 0;
}

//公众号：C语言中文社区
#include<stdio.h>
#define N 4
int main(void) {
    int arr[N];
    int i;
    for (i = 0; i < N; i++)
    {
        arr[i] = i;
        printf("&arr[%d]=%d\n", i, &arr[i]);
    }
    return 0;
}

//公众号：C语言中文社区
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#define N 5
int main(void) {
    int arr[N];//定义数组
    int i, temp;//定义变量
    printf("请输入一个5个元素数组：\n");
    for (i = 0; i < N; i++)
    {
        scanf("%d", &arr[i]);
    }
    printf("读取到的数组如下：\n");
    for (i = 0; i < N; i++)
    {
        printf("%d ",arr[i]);
    }
    printf("\n");
    for (i = 0; i < 2; i++)//将数组中元素的前后位置互换
    {
        temp = arr[i];
        arr[i] = arr[4 - i];
        arr[4 - i] = temp;
    }
    printf("输出的逆向数组如下：\n");
    for (i = 0; i < N; i++)
    {
        printf("%d ", arr[i]);
    }
    return 0;
}

//公众号：C语言中文社区
#include<stdio.h>

#define M 4
#define N 3


int main() {
  int arr[M][N];
  for (int i = 0; i < M; i++)
  {
    for (int j = 0; j < N; j++)
    {
      printf("&arr[%d][%d]=%d\t", i, j, &arr[i][j]);
    }
    printf("\n");
  }
  return 0;
}

//公众号：C语言中文社区
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main() {
  int arr[3][3];
  int i, j, sum = 0;
  printf("please input:\n");
  for (i = 0; i < 3; i++)
  {
    for (j = 0; j < 3; j++)
    {
      scanf("%d", &arr[i][j]);
    }
  }
  for (i = 0; i < 3; i++)
  {
    for ( j = 0; j < 3; j++)
    {
      if (i==j)
      {
        sum += arr[i][j];
      }
    }
  }
  printf("the result is: %d\n", sum);
  return 0;
}

//公众号：C语言中文社区
#include<stdio.h>
#define SIZE 20
int main() {
    long arr1[SIZE] = {'h','e','l','l','o',' ','w','o','r','l','d','!'};
    char arr2[SIZE] = { 'h','e','l','l','o',' ','w','o','r','l','d','!' };
    printf("long型字符数组占用的内存大小为：%d\n", sizeof(arr1));
    printf("char型字符数组占用的内存大小为：%d\n", sizeof(arr2));
    return 0;
}

//公众号：C语言中文社区
#include<stdio.h>
#define SIZE 20
int main() {
    int i;
    char arr[SIZE] = { 'h','e','l','l','o',' ','w','o','r','l','d','!' };
    for (i = 0; i < SIZE; i++)
    {
        printf("%c", arr[i]);
    }
    
    return 0;
}

//公众号：C语言中文社区
#include<stdio.h>
#define SIZE 20
int main() {
    int i;
    long arr[SIZE] = { 'h','e','l','l','o',' ','w','o','r','l','d','!' };
    for (i = 0; arr[i]!='\0'; i++)
    {
        printf("%c", arr[i]);
    }
    
    return 0;
}

//公众号：C语言中文社区
#include<stdio.h>
#define SIZE 20
int main() {
    int i;
    char arr[SIZE] = { "hello world!" };
    for (i = 0; arr[i] != '\0'; i++)
    {
        printf("%c", arr[i]);
    }
    
    return 0;
}

//公众号：C语言中文社区
#include<stdio.h>
int main() {
    int i;
    char arr1[] = { "hello world!" };
    char arr2[] = {'h','e','l','l','o',' ','w','o','r','l','d','!'};
    
    printf("采用字符串常量进行初始化的arr1数组的长度为：%d\n", sizeof(arr1));
    printf("采用字符常量列表进行初始化的arr2数组的长度为：%d\n", sizeof(arr2));
    
    return 0;
}

//
// Created by 冲哥 on 2021/22/09.
// 实现功能：交换数组中最大数和最小数的位置
//
//公众号：C语言中文社区
#include "stdio.h"

int main(){
    int a[10];
    int max, min;
    int m, n;

    printf("请输入10个数字：\n");
    for (int i = 0; i < 10; i++) {
        scanf("%d", &a[i]);
    }
    printf("输入的10个数是：\n");
    for (int i = 0; i < 10; i++) {
        printf("%4d", a[i]);
    }
    printf("\n");
    max = a[0];
    for (int i = 0; i < 10; i++) {
        if (a[i] > max) {
            max = a[i];
            m = i;
        }
    }

    min = a[0];
    for (int i = 0; i < 10; i++) {
        if (a[i] < min) {
            min = a[i];
            n = i;
        }
    }

    a[m] = min;
    a[n] = max;

    printf("交换最大数和最小数的位置后：\n");
    for (int i = 0; i < 10; i++) {
        printf("%4d", a[i]);
    }
}