Please fill out the skeleton code below(in bold). The prompt and header file are
ID: 3913758 • Letter: P
Question
Please fill out the skeleton code below(in bold). The prompt and header file are also below.
/* stack.c: Stack application. */
#include
#include
#include
#include "dynArray.h"
/* ***************************************************************
Using stack to check for unbalanced parentheses.
***************************************************************** */
/* Returns the next character of the string, once reaches end return '0' (zero)
param: s pointer to a string
pre: s is not null
*/
char nextChar(char* s)
{
static int i = -1;
char c;
++i;
c = *(s+i);
if ( c == '' )
return '';
else
return c;
}
/* Checks whether the (), {}, and [] are balanced or not
param: s pointer to a string
pre: s is not null
post:
*/
int isBalanced(char* s)
{
/* FIXME: You will write this function */
return 0;
}
int main(int argc, char* argv[]){
char* s=argv[1];
int res;
res = isBalanced(s);
if (res)
printf("The string %s is balanced ",s);
else
printf("The string %s is not balanced ",s);
return 0;
}
/* dynamicArray_a1.h : Dynamic Array implementation. */
#ifndef DYNAMIC_ARRAY_INCLUDED
#define DYNAMIC_ARRAY_INCLUDED 1
#ifndef __TYPE
#define __TYPE
# define TYPE char
# define TYPE_SIZE sizeof(int)
# endif
# ifndef LT
# define LT(A, B) ((A) < (B))
# endif
# ifndef EQ
# define EQ(A, B) ((A) == (B))
# endif
typedef struct DynArr DynArr;
/* Dynamic Array Functions */
void initDynArr(DynArr *v, int capacity);
DynArr *newDynArr(int cap);
void freeDynArr(DynArr *v);
void deleteDynArr(DynArr *v);
int sizeDynArr(DynArr *v);
void addDynArr(DynArr *v, TYPE val);
TYPE getDynArr(DynArr *v, int pos);
void putDynArr(DynArr *v, int pos, TYPE val);
void swapDynArr(DynArr *v, int i, int j);
void removeAtDynArr(DynArr *v, int idx);
/* Stack interface. */
int isEmptyDynArr(DynArr *v);
void pushDynArr(DynArr *v, TYPE val);
TYPE topDynArr(DynArr *v);
void popDynArr(DynArr *v);
/* Bag Interface */
/* Note addDynArr is already declared above*/
int containsDynArr(DynArr *v, TYPE val);
void removeDynArr(DynArr *v, TYPE val);
#endif
*********************************************************************************************************************************
#include
#include
#include "dynArray.h"
struct DynArr
{
TYPE *data; /* pointer to the data array */
int size; /* Number of elements in the array */
int capacity; /* capacity ofthe array */
};
/* ************************************************************************
Dynamic Array Functions
************************************************************************ */
/* Initialize (including allocation of data array) dynamic array.
param: v pointer to the dynamic array
param: cap capacity of the dynamic array
pre: v is not null
post: internal data array can hold cap elements
post: v->data is not null
*/
void initDynArr(DynArr *v, int capacity)
{
assert(capacity > 0);
assert(v!= 0);
v->data = (TYPE *) malloc(sizeof(TYPE) * capacity);
assert(v->data != 0);
v->size = 0;
v->capacity = capacity;
}
/* Allocate and initialize dynamic array.
param: cap desired capacity for the dyn array
pre: none
post: none
ret: a non-null pointer to a dynArr of cap capacity
and 0 elements in it.
*/
DynArr* newDynArr(int cap)
{
assert(cap > 0);
DynArr *r = (DynArr *)malloc(sizeof( DynArr));
assert(r != 0);
initDynArr(r,cap);
return r;
}
/* Deallocate data array in dynamic array.
param: v pointer to the dynamic array
pre: none
post: d.data points to null
post: size and capacity are 0
post: the memory used by v->data is freed
*/
void freeDynArr(DynArr *v)
{
if(v->data != 0)
{
free(v->data); /* free the space on the heap */
v->data = 0; /* make it point to null */
}
v->size = 0;
v->capacity = 0;
}
/* Deallocate data array and the dynamic array ure.
param: v pointer to the dynamic array
pre: none
post: the memory used by v->data is freed
post: the memory used by d is freed
*/
void deleteDynArr(DynArr *v)
{
freeDynArr(v);
free(v);
}
/* Resizes the underlying array to be the size cap
param: v pointer to the dynamic array
param: cap the new desired capacity
pre: v is not null
post: v has capacity newCap
*/
void _dynArrSetCapacity(DynArr *v, int newCap)
{
TYPE *temp = malloc(TYPE_SIZE * newCap);
int i;
/* FIXME: You will write this function */
assert(v != 0);
//copy the values into new array
for(i = 0; i < sizeDynArr(v); i++)
temp[i] = v->data[i];
free(v->data); // free old memory
v->data = temp; //update the array to point to new allocated memory
v->capacity = newCap; //update capacity
}
/* Get the size of the dynamic array
param: v pointer to the dynamic array
pre: v is not null
post: none
ret: the size of the dynamic array
*/
int sizeDynArr(DynArr *v)
{
return v->size;
}
/* Adds an element to the end of the dynamic array
param: v pointer to the dynamic array
param: val the value to add to the end of the dynamic array
pre: the dynArry is not null
post: size increases by 1
post: if reached capacity, capacity is doubled
post: val is in the last utilized position in the array
*/
void addDynArr(DynArr *v, TYPE val)
{
/* FIXME: You will write this function */
assert(v != 0);
if(sizeDynArr(v) == v->capacity) //if no more space, increase capacity to double of its value
{
_dynArrSetCapacity(v, 2 * v->capacity);
}
v->data[v->size] = val;
v->size++;
}
/* Get an element from the dynamic array from a specified position
param: v pointer to the dynamic array
param: pos integer index to get the element from
pre: v is not null
pre: v is not empty
pre: pos < size of the dyn array and >= 0
post: no changes to the dyn Array
ret: value stored at index pos
*/
TYPE getDynArr(DynArr *v, int pos)
{
/* FIXME: You will write this function */
/* FIXME: you must change this return value */
assert(v != 0 && !isEmptyDynArr(v));
assert(pos >= 0 && pos < sizeDynArr(v));
return v->data[pos];
}
/* Put an item into the dynamic array at the specified location,
overwriting the element that was there
param: v pointer to the dynamic array
param: pos the index to put the value into
param: val the value to insert
pre: v is not null
pre: v is not empty
pre: pos >= 0 and pos < size of the array
post: index pos contains new value, val
*/
void putDynArr(DynArr *v, int pos, TYPE val)
{
/* FIXME: You will write this function */
assert(v != 0 && !isEmptyDynArr(v));
assert(pos >= 0 && pos < sizeDynArr(v));
v->data[pos] = val; //put the val in pos overwriting old value
}
/* Swap two specified elements in the dynamic array
param: v pointer to the dynamic array
param: i,j the elements to be swapped
pre: v is not null
pre: v is not empty
pre: i, j >= 0 and i,j < size of the dynamic array
post: index i now holds the value at j and index j now holds the value at i
*/
void swapDynArr(DynArr *v, int i, int j)
{
/* FIXME: You will write this function */
assert(v != 0 && !isEmptyDynArr(v));
assert(i>=0 && j >= 0 && i < sizeDynArr(v) && j < sizeDynArr(v));
TYPE temp = v->data[i];
v->data[i] = v->data[j];
v->data[j] = temp;
}
/* Remove the element at the specified location from the array,
shifts other elements back one to fill the gap
param: v pointer to the dynamic array
param: idx location of element to remove
pre: v is not null
pre: v is not empty
pre: idx < size and idx >= 0
post: the element at idx is removed
post: the elements past idx are moved back one
*/
void removeAtDynArr(DynArr *v, int idx)
{
int i;
/* FIXME: You will write this function */
assert(v != 0 && !isEmptyDynArr(v));
assert(idx >= 0 && idx < sizeDynArr(v));
//more all elements back by 1 position starting from idx
for(i = idx; i < sizeDynArr(v) - 1; i++)
v->data[i] = v->data[i+1];
//reduce the size
v->size--;
}
/* ************************************************************************
Stack Interface Functions
************************************************************************ */
/* Returns boolean (encoded in an int) demonstrating whether or not the
dynamic array stack has an item on it.
param: v pointer to the dynamic array
pre: the dynArr is not null
post: none
ret: 1 if empty, otherwise 0
*/
int isEmptyDynArr(DynArr *v)
{
/* FIXME: You will write this function */
assert(v != 0);
/* FIXME: You will change this return value*/
if(sizeDynArr(v) == 0)
return 1;
else
return 0;
}
/* Push an element onto the top of the stack
param: v pointer to the dynamic array
param: val the value to push onto the stack
pre: v is not null
post: size increases by 1
if reached capacity, capacity is doubled
val is on the top of the stack
*/
void pushDynArr(DynArr *v, TYPE val)
{
/* FIXME: You will write this function */
assert(v != 0);
addDynArr(v, val);
}
/* Returns the element at the top of the stack
param: v pointer to the dynamic array
pre: v is not null
pre: v is not empty
post: no changes to the stack
*/
TYPE topDynArr(DynArr *v)
{
/* FIXME: You will write this function */
assert(v != 0 && !isEmptyDynArr(v));
/* FIXME: You will change this return value*/
return v->data[sizeDynArr(v) - 1];
}
/* Removes the element on top of the stack
param: v pointer to the dynamic array
pre: v is not null
pre: v is not empty
post: size is decremented by 1
the top has been removed
*/
void popDynArr(DynArr *v)
{
/* FIXME: You will write this function */
assert(v != 0 && !isEmptyDynArr(v));
removeAtDynArr(v, sizeDynArr(v) - 1);
}
/* ************************************************************************
Bag Interface Functions
************************************************************************ */
/* Returns boolean (encoded as an int) demonstrating whether or not
the specified value is in the collection
true = 1
false = 0
param: v pointer to the dynamic array
param: val the value to look for in the bag
pre: v is not null
pre: v is not empty
post: no changes to the bag
*/
int containsDynArr(DynArr *v, TYPE val)
{
int i;
/* FIXME: You will write this function */
assert(v != 0 && !isEmptyDynArr(v));
/* FIXME: You will change this return value */
for( i = 0; i < sizeDynArr(v); i++)
{
if(EQ(val, v->data[i])) //found the val
return 1;
}
return 0;//did not find
}
/* Removes the first occurrence of the specified value from the collection
if it occurs
param: v pointer to the dynamic array
param: val the value to remove from the array
pre: v is not null
pre: v is not empty
post: val has been removed
post: size of the bag is reduced by 1
*/
void removeDynArr(DynArr *v, TYPE val)
{
int i;
assert(v != 0 && !isEmptyDynArr(v));
/* FIXME: You will write this function */
for(i = 0; i < sizeDynArr(v); i++)
{
if(EQ(val, v->data[i]))
{
removeAtDynArr(v, i); // remove the element at index i
break;
}
}
}
Explanation / Answer
Replace the code from above in your bold section. Thanks!