Example of structure, C/C++ Programming

Example of structure:

struct item

{

                int element;

                node_ptr next;

};

typedef node_ptr stack;

stack create(void)

{

                stack s;

                s=(stack)malloc(sizeof(struct item));

                s->next=NULL;

                return s;

}

void push(stack s,int a)

{

                node_ptr temp;

                temp=(node_ptr)malloc(sizeof(struct item));

                temp->element=a;

                temp->next=s->next;

                s->next=temp;

}

int is_empty(stack s)

{

                return(s->next==NULL);

}

void  pop(stack s)

{

                node_ptr temp;

                temp=s->next;

                s->next=temp->next;

                free(temp);

 

}

int top(stack s)

{

                return(s->next->element);

}

void main()

{

                stack s;

                char exp[100];

                int i;

                s=create();

                clrscr();

                printf("Enter an expression\n");

                scanf("%s",exp);

                for(i=0;exp[i];i++)

                {

                                if(exp[i]=='('||exp[i]=='['||exp[i]=='{')

                                                push(s,exp[i]);

                                else

                                if(exp[i]==')')

                                                if(top(s)!='(')

                                                {

                                                                printf("Invalid Expression");

                                                                return;

                                                }

                                                else

                                                                pop(s);

                                else

                                if(exp[i]=='}')

                                                if(top(s)!='{')

                                                 {

                                                                printf("Invalid Expression");

                                                                return;

                                                 }

                                                else

                                                                pop(s);

                                else

                                if(exp[i]==']')

                                                if(top(s)!='[')

                                                {

                                                                                printf("Invalid Expression");

                                                                return;

                                                }

                                                else

                                                                pop(s);

                }

                if(!is_empty(s))

                                                {

                                                printf("Invalid Expression");

 

                                }

}

 

 

Posted Date: 10/18/2012 6:20:20 AM | Location : United States







Related Discussions:- Example of structure, Assignment Help, Ask Question on Example of structure, Get Answer, Expert's Help, Example of structure Discussions

Write discussion on Example of structure
Your posts are moderated
Related Questions

Most first graders know that nine hundred and ninety nine plus one is one thousand, but C++ doesn't! Sure, a computer can easily compute 999 + 1 and get 1000. But reading and writi

I have to add virtual void calculatePay and virtual void displayEmployee. How to I implement that in Salaried and Hourly Employee?

padovan string generation till 40

hwat is the area fsdjlakl;aeklfjtealrtl;gka

is getchar() is a C++ library function?

I need website Product section search box coding section fix Project Description: On our products section in the search box it only searches the name and title of our product

implementation of the power and factorial in programs

#question:-program to counts tha no of occurances of the string in the nth padovan string

Increment and Decrement Operators.   The operator for increment is '++' and decrement is '-'. These operators enhances or decrease the value of a variable on which they are ope