<分区>
以下是我的 c 程序，它对数组执行各种操作。当我删除任何元素时，delete_ele 函数会删除并正确显示数组，但遍历函数会显示一些垃圾值。例如。如果最初我有 4 个元素并删除第一个元素，则 delete_ele 函数将显示剩余的 3 个元素，但遍历函数显示 4 个元素(剩余的 3 个元素以及末尾的垃圾值)。请告诉我错误。
#include<stdio.h>
#include<conio.h>
void insert_ele(int i,int ar[],int len){
int ele, loc;
printf("\nEnter element to be inserted : ");
scanf("%d",&ele);
printf("\nEnter location : ");
scanf("%d",&loc);
if(i==19){
printf("\nOverflow");
}
else{
while(i>=loc){
ar[i+1]=ar[i];
i--;
}
ar[loc]=ele;
len++;
printf("\nNew Array : ");
for(i=0;i<len;i++){
printf("\t%d",ar[i]);
}
}
}
void delete_ele(int i,int ar[],int len){
int loc;
printf("\nEnter location of element to be deleted : ");
scanf("%d",&loc);
if(len==0){
printf("\nUnderflow");
}
else{
for(i=loc;i<len;i++){
ar[i]=ar[i+1];
}
len--;
printf("\nNew Array : ");
for(i=0;i<len;i++){
printf("\t%d",ar[i]);
}
}
}
void find_ele(int i,int ar[],int len){
int ele, count=0;
printf("\nEnter element to be searched : ");
scanf("%d",&ele);
for(i=0;i<len;i++){
if(ar[i]==ele){
count++;
}
}
if(count == 0){
printf("\nElement does not exist");
}
else{
printf("\nElement found %d times",count);
}
}
void traverse(int i, int ar[], int len){
printf("\nTotal number of Elements are : %d",len);
printf("\nElements are : ");
for(i=0; i<len; i++){
printf("\t%d",ar[i]);
}
}
void main(){
int ar[20], i=0, len=0, ch;
char choice;
clrscr();
printf("\nEnter number of elements you want to insert : ");
scanf("%d",&len);
for(i=0; i<len; i++){
printf("Enter element %d : ",i);
scanf("%d",&ar[i]);
}
i--;
label:
printf("\nPress 1 to insert, 2 to delete, 3 to find any element");
printf("\n or 4 to traverse the array : ");
scanf("%d",&ch);
switch(ch){
case 1:insert_ele(i, ar, len);
break;
case 2:delete_ele(i, ar, len);
break;
case 3:find_ele(i, ar, len);
break;
case 4:traverse(i, ar, len);
break;
default:printf("\nInvalid Option");
break;
}
printf("\nPress y to continue or any other key to quit : ");
scanf("%s",&choice);
if(choice=='y' || choice=='Y'){
goto label;
}
getch();
}