数组的增、删、改、查

#include<stdio.h>
int length;
int arr[6] = { 1, 2, 3, 4, 5, 6 };
length = sizeof(arr) / sizeof(arr[0]);


//增
void Add()
{
for (int i = 0; i < length; i++)
{
if (arr[i] ==3)
{
for (int j =length-1; j>0; j--)
{
arr[j] = arr[j -1];
}
arr[i] = 2;
length++;
break;
}

}
}
//删
void Delete()
{
for (int i = 0; i < length; i++)
{
if (arr[i] ==2)
{
for ( int j = i; j < length-1; j++)
{
arr[j] = arr[j+1];
}
length--;
break;
}


}
}


//查
void Find()
{
for (int i = 0; i < length; i++)
{
if (arr[i] == 3)
{
printf("%d\n",i);
}
}
}


//改
void Change()
{
for (int i = 0; i < length; i++)
{
if (arr[i] == 3)
{
arr[i] = 10;
}
}
}
//打印函数
void show()
{
for (int i = 0; i < length; i++)
{
printf("%d\t",arr[i]);
}
printf("\n");
}


int main()
{


printf("原数组元素为：\n");
show();


printf("------删------\n");
Delete();
show();




printf("------增------\n");
Add( );
show();


printf("------查------\n");


Find( );


printf("------改------\n");
Change( );
show();
getchar();
getchar();
return 0;

}

运行结果：