C語言小程序之數組操作實例代碼

2020-02-24 14:37:35

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為了能讓大家能循序漸進地學習C語言示例代碼，我們將從最基礎的C語言示例程序開始學習，那接下來先附上這篇C語言小程序之數組操作實例代碼，一起來
了解下其中的詳情吧。

#include 
#include 
#include 
int size = 0;
int flag = 0;
void output(int *arry)
{
?int i = 0;
?for(i=0; i?{
??printf("arry[%d]=%d/t",i,arry[i]);
??if((i+1)%5 == 0)
???printf("/n");
?}
?printf("/n");
}
void getarry(int *arry)
{
?int i = 0;
?srand(time(NULL));
?for(i=0; i?{
??arry[i] = rand() % 100;
?}
}
void add(int *arry, int pos, int num)
{
?int i = 0;
?if(pos>=0 && pos?{
??if(pos ??{
???for(i=size; i>pos; i--)
???{
????arry[i] = arry[i-1];
???}
???arry[pos] = num;
??}
??else?????//在最后的位置插入
??{
???arry[size] = num;
??}
??size++;
?}
?else
??printf("只能在0-%d的位置插入。/n",size);
}
int search(int *arry, int num)
{
?static int pos = 0;
?if(flag)
??pos++;
?for(; pos?{
??if(arry[pos] == num)
??{
???flag = 0;
???return pos;
??}
?}
?return -1;
}
void mod(int *arry, int pos, int num)
{
?if(pos>=0 && pos?{
??arry[pos] = num;
?}
?else
?{
??printf("輸入位置錯誤。/n");
?}
}
int del(int *arry, int num)
{
?int count = 0;
?int pos = 0;
?int i = 0;
?pos=search(arry, num);
?while(pos+1)
?{
??for(i=pos; i??{
???arry[i] = arry[i+1];
??}
??count++;
??pos=search(arry, num);
?}
?return count;
}
int main()
{
?//pos 0到size-1
?int *arry = NULL;
?int count = 0;
?int pos = 0;
?int num = 0;
?printf("輸入要產生多少個隨機數：");
?scanf("%d",&size);
?arry = malloc(2*size*sizeof(int));
?getarry(arry);
?output(arry);
?printf("輸入要添加的位置(0-%d)：",size);
?scanf("%d",&pos);
?printf("輸入要添加的數字：");
?scanf("%d",&num);
?add(arry, pos, num);
?output(arry);
?printf("輸入要查找的數字：");
?scanf("%d",&num);
?pos=search(arry, num);
?while(pos+1)
?{
??flag = 1;
??count++;
??printf("arry[%d]=%d/n",pos, num);
??pos=search(arry, num);
?}
?printf("共找到%d個匹配數字/n",count);
?printf("輸入要修改的位置：");
?scanf("%d",&pos);
?printf("輸入要修改為數字：");
?scanf("%d",&num);
?mod(arry, pos, num);
?output(arry);
?printf("輸入要刪除的數字：");
?scanf("%d",&num);
?del(arry, num);
?output(arry);
?free(arry);
?arry = NULL;
?return 0;
}