#include <stdio.h>
#include <stdlib.h>
int isempty();
int isfull();
void insert(int,int);
int gethighestpriority();
int deletehighestpriority();
void display();
struct priority_queue
{
int ele;
int priority;
}pq[5];
int rear=-1;
main()
{
int ch,p,ele;
do
{
printf("\n1.Insert\n2.Get highest Priority\n3.Delete highest Priority\n4.Display\n5.Exit");
printf("\n Enter your Choice: ");
scanf("%d",&ch);
switch(ch)
{
case 1:
if(isfull())
printf("\n Priority Queue is Full");
else
{
printf("\n Enter element to insert: ");
scanf("%d",&ele);
printf("\n Enter priority: ");
scanf("%d",&p);
insert(ele,p);
}
break;
case 2:
if(isempty())
printf("Priority Queue is empty");
else
{
p=gethighestpriority();
printf("\n Highest priority= %d",p);
}
break;
case 3:
if(isempty())
printf("Priority Queue is empty");
else
{
ele=deletehighestpriority();
printf("\n %d is Deleted",ele);
}
break;
case 4:
if(isempty())
printf("Priority Queue is empty");
else
display();
break;
}
}while(ch!=5);
int isempty()
{
if (rear==-1)
return 1;
else
return 0;
}
int isfull()
{
if (rear==4)
return 1;
else
return 0;
}
void insert(int ele,int p)
{
rear=rear+1;
pq[rear].ele=ele;
pq[rear].priority=p;
}
int gethighestpriority()
{
int i,p=-1;
if(!isempty())
{
for(i=0;i<=rear;i++)
{
if (pq[i].priority>p)
p=pq[i].priority;
}
}
}
return p;
}
int deletehighestpriority()
{
int i,j,p,ele;
p=gethighestpriority();
for(i=0;i<=rear;i++)
{
if(pq[i].priority==p)
{
ele=pq[i].ele;
break;
}
}
if(i<rear)
{
for(j=i;j<rear;j++)
{
pq[j].ele=pq[j+1].ele;
pq[j].priority=pq[j+1].priority;
}
}
rear=rear-1;
return ele;
}
void display()
{
int i;
printf("\n Priority Queue: ");
for(i=0;i<=rear;i++)
printf("|ele=%d-priority=%d |",pq[i].ele,pq[i].priority);
} Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'C' and start coding!
OneCompiler's C online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample C program which takes name as input and print your name with hello.
#include <stdio.h>
int main()
{
char name[50];
printf("Enter name:");
scanf("%s", name);
printf("Hello %s \n" , name );
return 0;
}
C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.
When ever you want to perform a set of operations based on a condition if-else is used.
if(conditional-expression) {
// code
} else {
// code
}
You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to if-else-if ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type array-name[size];
data-type array-name[size][size];
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
Two types of functions are present in C
Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,
User defined functions are the ones which are written by the programmer based on the requirement.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
//code
}