;#include <stdio.h>
int main()
{

    int x=10;
    int *p;
    p=&x;
    printf("x=%d\n",x);
    printf("%u",&x);
    printf("%d",*(&x));
    printf("%d",*p);
    return 0;    
    }

#include<stdio.h>

int main(){
    int x=20;

    int* p =&x;
    int **q=&p;
    printf("Value of x is %d\n",x);   // 10
    printf("Address of x is %p\n",&x);  // 100
    printf("%p\n",p);  // 10
    printf("%u\n",&p);  // 10
    printf("%u\n",q);
    printf("%u\n",*q);
    printf("%d\n",**q);

    return 0;
}

Output

Value of x is 20

Address of x is 0x7ffe080aa024

0x7ffe080aa024

134914088

134914088 134914084

Swaping

#include <stdio.h>

void swap(int* , int*);// we pass the address of the integer save in the integer variable
int main()
{
int a =10,b=20;
swap(&a,&b);
printf("a= %d,b=%d",a,b);
return 0;
}
void swap(int *p, int *q)
{
int temp;
temp=*p;
*p=*q;
*q=temp;
}

array find the largest number.

#include<stdio.h>
int main(){
    int arr[6];
    printf("Enter any numbers:- ");
    for(int i=0;i<6;i++){
        scanf("%d",&arr[i]);
    }
    int max=arr[0];
    int min=arr[0];
    for(int i=0;i<6;i++){
        if(max<arr[i]){
            max=arr[i];
        }
        if(min>arr[i]){
            min=arr[i];
        }
    }
    printf("The largest element of the array is:-%d\n",max);
    printf("The smallest element of the array is:-%d\n",min);
    return 0;
}

Output

Enter any 6 numbers: - 2 24 3 5 5 5

largest number-24

Smallest Number-2

USing Function with array find the largest Number

#include<stdio.h>
# define MAXI 5
void input(int* , int);
int max(int* ,int);
void output(int*, int);
void input(int* x,int n){
    printf("Enter %d element in array",n);
    for(int i=0;i<n;i++){
       scanf("%d",&x[i]); 
    }
}
int max(int* x,int n){
    int max=x[0];
    for(int i=0;i<n;i++){
        if(max<x[i]){
            max=x[i];
        }

}
 return max;
}
void output(int* x,int n){
    printf("%d Enter the Element in array",n);
    for(int i=0;i<n;i++){
       printf("%d ",x[i]); 
    }
    printf("\n");
}
int main(){
    int arr[MAXI];
    int k;
    printf("Enter the size of array :- ");
    scanf("%d",&k);
    input(arr,k);
    output(arr,k);
    printf("Maximun element in array is %d \n",max(arr,k));

    return 0;
}

Output

Enter the size of array :- 3

Enter element in array32 1 13

Enter the Element in array 32 1 13 Maximun element in array is 13

TRILOK SIR

Run in a Turbo C 
 #include <stdio.h>

// int main() 

// { 

// int a; 

// printf("enter a number"); 

 scanf("%u",&a); 

 printf("a=%d",a); 

}



#include <stdio.h>

int main() {

 // int a=3;

 // int p; 

// int q;

 // p-&a; 

// q-a;

// int a=3,i=0; 

// i= a++* a++* a++;

 // printf("i=%d a=%d",i,a);

//char ch[]="GATE2024"; char *p=ch; printf("%s",p+p[3]-p[1]);

 => 1000+E-A 

=> 1000 + 69 -65 (A and E are ASSIC VALUE) 

 => 1000 + 4

 1004 so it started with 2004 because the 2 have a base address is 1004




// int a =300,i=0;
// i=a*a/a;
// printf("%d",i);

return 0; }

Program for Stack in C [Push, Pop, Display]


#include<stdio.h>
#define MAX 5 //Maximum number of elements that can be stored
int top=-1,stack[MAX];
void push();
void pop();
void display();

void main()
{
int ch;
while(1) //infinite loop, will end when choice will be 4
{
printf("\n*** Stack Menu ***");
printf("\n\n1.Push\n2.Pop\n3.Display\n4.Exit");
printf("\n\nEnter your choice(1-4):");
scanf("%d",&ch);
switch(ch)
{
case 1: push();
break;
case 2: pop();
break;
case 3: display();
break;
case 4: exit(0);
default: printf("\nWrong Choice!!");
}
}
}

void push()
{
int val;
if(top==MAX-1)
{
printf("\nStack is full!!");
}
else
{
printf("\nEnter element to push:");
scanf("%d",&val);
top=top+1;
stack[top]=val;
}
}

void pop()
{
if(top==-1)
{
printf("\nStack is empty!!");
}
else
{
printf("\nDeleted element is %d",stack[top]);
top=top-1;
}
}

void display()
{
int i;
if(top==-1)
{
printf("\nStack is empty!!");
}
else
{
printf("\nStack is...\n");
for(i=top;i>=0;--i)
printf("%d\n",stack[i]);
}
}