#include <stdio.h>
static int array[100];
int j,i,n,p;
int ch;
void du()
{
printf("please tell me which number do you operate: ");
scanf("%d",&i);
while(i>n)
{
printf("error,please input again");
scanf("%d",&i);
}
}
void da()
{
printf("the list is");
for(j=0;j<n;j++)
printf("%4d",array[j]);
printf("\n");
}
void show()
{
printf("----------------------------- \n");
printf(" the function of the list\n");
printf("1: insert\n");
printf("2: delete\n");
printf("3: save new element\n");
printf("4: read list\n");
printf("5: check\n");
printf("6: the length of the list\n");
printf("0: end\n");
printf("----------------------------- \n");
}
int main()
{
printf("please input the length of list:");
scanf("%d",&n);
printf("\n");
printf("please enter the elements:");
for(i=0;i<n;i++)
scanf("%d",&array[i]);
p=1;
while(p!=0)
{
show();
printf("enter p: ");
scanf("%d",&p);
if(p>=0&&p<=6)
{
switch(p)
{
case 1:
printf("the inserted number places the front of the operation: \n");
du();
for(j=n-1;j>=i-1;j--)
array[j+1]=array[j];
printf("please enter number: ");
scanf("%d",&ch);
array[i-1]=ch;
n++;
da();
break;
case 2:
du();
for(j=i-1;j<=n;j++)
array[j]=array[j+1];
n--;
da();
break;
case 3:
du();
printf("please enter new element: \n");
scanf("%d",&ch);
printf("\n");
array[i-1]=ch;
da();
break;
case 4:
da();
break;
case 5:
du();
printf("what is the %d number: ",i);
printf("%3d\n",array[i-1]);
break;
case 6:
printf("the length of the list is: ");
printf("%3d\n",n);
break;
case 0:
p=0;
break;
}
}
}
printf("error,please enter new number");
}
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