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DynamicArray.c
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DynamicArray.c
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#include<stdio.h>
#include<stdlib.h>
struct Array{
int capacity;
int lastIndex;
int *ptr;
};
struct Array* createArray(int cap){
struct Array *arr;
arr=(struct Array*)malloc(sizeof(struct Array));
arr->capacity=cap;
arr->lastIndex=-1;
arr->ptr=(int*)malloc(sizeof(int)*cap);
return arr;
}
void doubleArray(struct Array *arr)
{
int *temp,i;
temp=(int*)malloc(sizeof(int)*(arr->capacity)*2);
for(i=0;i<=arr->lastIndex;i++)
temp[i]=arr->ptr[i];
free(arr->ptr);
arr->ptr=temp;
arr->capacity*=2;
}
void halfArray(struct Array *arr)
{
realloc(arr->ptr,2);
}
void append(struct Array *arr,int data)
{
if(arr->capacity-1==arr->lastIndex)
doubleArray(arr); //printf("overflow");
arr->lastIndex+=1;
arr->ptr[arr->lastIndex]=data;
}
void setValue(struct Array *arr,int index,int data)
{
int i;
if(index<0 || index > arr->lastIndex+1)
printf("invalid index");
else if(arr->capacity-1==arr->lastIndex)
doubleArray(arr); //printf("overflow");
for(i=arr->lastIndex;i>=index;i--)
arr->ptr[i+1]=arr->ptr[i];
arr->ptr[index]=data;
arr->lastIndex+=1;
}
void editValue(struct Array *arr,int index,int data)
{
if(index<0||index>arr->lastIndex)
printf("invalid index");
else
arr->ptr[index]=data;
}
int get(struct Array *arr,int index)
{
if(index<0 || index>arr->lastIndex)
printf("invalid index");
else
return arr->ptr[index];
}
int count(struct Array *arr)
{
return arr->lastIndex+1;
}
void deleteValue(struct Array *arr,int index)
{
int i;
if(arr->lastIndex==-1)
printf("underflow");
else if(index<0 || index> arr->lastIndex)
printf("invalid index");
else{
for(i=index;i<arr->lastIndex;i++)
arr->ptr[i]=arr->ptr[i+1];
arr->lastIndex-=1;
}
}
int menu()
{
int ch;
printf("\n 1. insert an item ");
printf("\n 2. append an item ");
printf("\n 3. print Array value");
printf("\n 4. delete value");
printf("\n 5. count total items present ");
printf("\n 6. edit values");
printf("\n 7. array capacity ");
printf("\n 8. exit");
printf("\n\n Enter your choice: ");
scanf("%d",&ch);
return ch;
}
void main(){
int index,data,i;
struct Array *arr;
arr=createArray(10);
while(1)
{
switch(menu())
{
case 1:
printf("enter index and data to insert ");
scanf("%d%d",&index,&data);
setValue(arr,index,data);
break;
case 2:
printf("enter data to append ");
scanf("%d",&data);
append(arr,data);
break;
case 3:
printf("\n ");
for(i=0;i<count(arr);i++)
printf(" %d",get(arr,i));
break;
case 4:
printf("enter index to delete value ");
scanf("%d",&index);
deleteValue(arr,index);
break;
case 5:
printf("Total Values = %d",count(arr));
break;
case 6:
printf("enter index and new data to edit ");
scanf("%d%d",&index,&data);
editValue(arr,index,data);
break;
case 7:
printf("current capacity of dynamic array is %d",arr->capacity);
break;
case 8:
printf("Thankyou %c % c %c, press any key to exit....",2,2,2);
getch();
exit(0);
default:
printf("Invalid Choice");
}
getch();
system("cls");
}
}