<span style="font-size:18px;">#include<stdio.h> int search(int *apt,int n,int key)/*返回在数组中和key值相等值的下标*/ { int *p; for(p=apt;p<apt+n;p++) { if(*p==key) return p-apt; } return NULL;/*不可以在if下面直接else,因为得循环找出和key值相同的值,遍历完了发现没有才返回null*/ } int *find(int *apt,int n,int key)/*返回在数组中和key值相等值的地址*/ { int *p; for(p=apt;p<apt+n;p++) { if(*p==key) return p; } return NULL; } void main() { int a[]={2,3,7,0,5,24,67,45,90,6,1,8,88}; int key,i; for(i=0;i<sizeof(a)/sizeof(int);i++) printf("%4d",a[i]); printf("\n"); printf("please input the key number!\n"); scanf("%d",&key); printf("The address of a[0] is: %d.\n",a); printf("The label number of the key number in the array is %d\n",search(a,sizeof(a)/sizeof(int),key)); printf("The adress of the key number %d\n",find(a,sizeof(a)/sizeof(int),key)); }</span>
寻找制定元素的指针
时间: 2024-10-04 23:52:40