一维数组的应用举例
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💥所属专栏：C语言
本系列文章为个人学习笔记，在这里撰写成文一为巩固知识，二为同样是初学者的学友展示一些我的学习过程及心得。文笔、排版拙劣，望见谅。
1、
【二分查找】
#include <stdio.h> //【函数版】
int binary_serach(int* arr, int i, int sz)
{
int left = 0;
int right = sz - 1;
while (left <= right)
{
int mid = left + (right - left) / 2;
if (arr[mid] < i)
{
left++;
}
else if (arr[mid] > i)
{
right--;
}
else
{
printf("找到了，下标是：%d\n", mid);
break;
}
}
if (left > right)
{
printf("找不到\n");
}
}
int main()
{
int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
int sz = sizeof(arr) / sizeof(arr[0]);
int i = 0;
printf("请输入想要查找的数：");
scanf("%d", &i);
binary_serach(arr, i, sz);
return 0;
}
#include <stdio.h> //【函数版】
int binary_serach(int arr[], int i, int sz)
{
int left = 0;
int right = sz - 1;
while (left <= right)
{
int mid = left + (right - left) / 2;
if (arr[mid] < i)
{
left++;
}
else if (arr[mid] > i)
{
right--;
}
else
{
return mid;
}
}
return -1;
}
int main()
{
int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
int sz = sizeof(arr) / sizeof(arr[0]);
int i = 0;
scanf("%d", &i);//输入想要查找的数
int ret = binary_serach(arr, i, sz);
if (ret == -1)
{
printf("没有找到\n");
}
else
{
printf("找到了，下标是：%d\n", ret);
}
return 0;
}
#include <stdio.h> //【常规版】
int main()
{
int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
int sz = sizeof(arr) / sizeof(arr[0]);
int left = 0;
int right = sz - 1;
int i = 0;
printf("请输入想要查找的数：");
scanf("%d", &i);
while (left <= right)
{
int mid = left + (right - left) / 2;
if (arr[mid] < i)
{
left++;
}
else if (arr[mid] > i)
{
right--;
}
else
{
printf("找到了，下标是：%d\n", mid);
break;
}
}
if (left > right)
{
printf("找不到\n");
}
return 0;
}
#include <stdio.h> //【优化版】
int main()
{
int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
int sz = sizeof(arr) / sizeof(arr[0]);
int left = 0;
int right = sz - 1;
int i = 0;
printf("请输入想要查找的数：");
scanf("%d", &i);
while (left <= right)
{
int mid = left + (right - left) / 2;
if (arr[mid] < i)
{
left = mid + 1;
}
else if (arr[mid] > i)
{
right = mid - 1;
}
else
{
printf("找到了，下标是：%d\n", mid);
break;
}
}
if (left > right)
{
printf("找不到\n");
}
return 0;
}
2、
【数组的打印】
#include <stdio.h>
#include <windows.h>
#include <stdlib.h>
int main()
{
char arr1[] = "Welcome to Bit!!!!!!";
char arr2[] = "####################";
int left = 0;
int right = strlen(arr1) - 1;
while (left <= right)
{
printf("%s\n", arr2);
arr2[left] = arr1[left];
arr2[right] = arr1[right];
left++;
right--;
Sleep(1000);
system("cls");
}
printf("%s\n", arr2);
return 0;
}
3、
输入：
5 6
1 3 7 9 22
2 8 10 17 33 44
输出：
1 2 3 7 8 9 10 17 22 33 44
#include <stdio.h>
int main()
{
int n = 0;
int m = 0;
int a = 0;
int b = 0;
int c = 0;
int A[]; //这里VS上不支持变长数组
int B[];
int C[];
scanf("%d%d", &n, &m);
for (a = 0; a < n; a++)
{
scanf("%d", &A[a]);
}
for (b = 0; b < m; b++)
{
scanf("%d", &B[b]);
}
while (a < n && b < m)
{
if (A[a] < B[b])
{
C[c++] = A[a++];
}
else
{
C[c++] = B[b++];
}
}
while (a < n)
{
C[c++] = A[a++];
}
while (b < m)
{
C[c++] = B[b++];
}
for (int i = 0; i < n + m; i++)
{
printf("%d ", C[i]);
}
return 0;
}4、
【一行，逆序输出输入的10个整数，用空格分隔。】
#include <stdio.h>
int main()
{
int i = 0;
int arr[10];
for (i = 0; i < 10; i++)
{
scanf("%d", &arr[i]);
}
for (i = 9; i >= 0; i--)
{
printf("%d ", arr[i]);
}
return 0;
}
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原文地址：https://blog.csdn.net/2301_78843337/article/details/137893434
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