实验五 数组和指针

Part1   ABCDEFG都可以表示
Part2(1)
#include  <stdio.h>
#include <stdlib.h> 
const int N=5;

int binarySearch(int x[], int n, int item); 

int main() {
	int a[N]={2,7,19,45,66};
	int i,index, key;
	
	printf("数组a中的数据:\n");
	for(i=0;i<N;i++)
	   printf("%d ",a[i]);
	printf("\n");
	
	printf("输入待查找的数据项: ");
	scanf("%d", &key);

	index=binarySearch(a,N,key);
	
	if(index>=0) 
		printf("%d在数组中，下标为%d\n", key, index);
	else
		printf("%d不在数组中\n", key); 
   
   system("pause");
   return 0;
}
int binarySearch(int x[], int n, int item) {
	int low, high, mid;
	
	low = 0;
	high = n-1;
	
	while(low <= high) {
		mid = (low+high)/2;
		
		if (item == x[mid])
			return mid;
		else if(item<x[mid])
			high = mid - 1;
		else
			low = mid + 1;
	}
	
	return -1;
}

#include  <stdio.h>
#include <stdlib.h> 
#define  N  10
int fun(int *a,int m)
{ 
	int low = 0, high = N-1, mid;
	/*************ERROR**************/
  	while(low <= high)
  	{  
        mid = (low+high)/2;
		/*************ERROR**************/
        if(m < *(a+mid))
             high = mid-1;
		/*************ERROR**************/
        else if(m > *(a+mid))
            low = mid+1;
        else  
			return(mid);
  	}
  	return(-1);
}

int main()
{  
	int i,a[N]={-3,4,7,9,13,24,67,89,100,180},k,m;
   	printf("a数组中的数据如下:\n");
   	for(i=0;i<N;i++)
	   printf("%d ",a[i]);
   	printf("\nEnter m: \n"); 
   	scanf("%d",&m);
	/*************ERROR**************/
   	k = fun(a,m);
   	if (k>=0) 
	   printf("m=%d,index=%d\n",m,k);
   	else 
	   printf("Not be found!\n");
	
	system("pause");
   	return 0;
}

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
void  fun(char *a) {
    /*****ERROR********/
    int i=0; 
     char *p = a;
    /****ERROR***/
    while(*p && *p == ‘*‘) { 
        a[i] = *p;
        i++;
        p++; 
    } 
	while(*p) { 
    /******ERROR*******/
        if(*p != ‘*‘)  { 
            a[i] = *p;
            i++; 
        } 
        p++; 
    }
    /******ERROR*******/
    a[i] = 0; 
  
}

int main() {
  	char s[81];
  	printf("Enter a string :\n");
  	gets(s);
  	/***ERROR******/
  	fun(s);
  	printf("The string after deleted:\n");
  	puts(s);
  	
  	system("pause");
	return 0; 
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void fun(char *a) {
	/**ERROR******/
	int i=0;
	char *t = a, *f = a;
    char *q = a;
	 
    while(*t)
	    t++;
	t--;
	
	while(*t == ‘*‘)
		t--;
		
	while(*f == ‘*‘)
		f++;
	/***ERROR***/
    while (q<f) { 
        a[i] = *q;
        q++;
        i++; 
    } 
    while (q<t) {
    	/***ERROR**/
		if(*q != ‘*‘) { 
    	    a[i] = *q;
	    	i++; 
    	} 
        q++; 
    } 
    
	while (*q) { 
        a[i] = *q;
        i++;
        q++; 
    } 
    /**ERROR**/
    a[i]=0;
}
int main () {
	char s[81];
	printf("Entre a string:\n");
	gets(s);
	/**ERROR**/
	fun(s);
	printf("The sting after deleted:\n");
	puts(s);
	
	system("pause");
	return 0;
}