solve_problem.c

//  ============================================================
//                    📌 Practice Problems
//                    Topic : C Programming - Pointer
//  ============================================================

// 👉👉  🔹🔹Qu - 1️⃣

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

    ptr = &a;
    *ptr = 0;                    //   Store 0 ;
    printf("a = %d\n", a);       // value of a  =  0;
    printf("*ptr = %d\n", *ptr); // value of ptr = 0;

    //    2nd part
    *ptr = *ptr + 5; // *ptr += 5 ;
    printf("a = %d\n", a);
    printf("*ptr = %d\n", *ptr);

    // 3rd part
    (*ptr)++;
    printf("a = %d\n", a);
    printf("*ptr = %d\n", *ptr);

    return 0;
}

// 👉👉  🔹🔹Qu - 2️⃣  print the value of 'i' froms it pointer to pinter

#include <stdio.h>
int main(){
   int i = 5;
   int *ptr = &i;
   int **pptr = &ptr ;
   printf("Value of **pptr = :%d\n : " , **pptr);
    return 0;
}

// 👉👉  🔹🔹Qu - 3️⃣ Swap 2 Numbers  a &b

#include <stdio.h>
int main(){
  int a = 5;
  int b = 3;

  int t = a;
   a = b;
   b = t;
  printf("a  = %d , b = %d\n " , a,b) ;
    return 0;
}  

// 👉👉  🔹🔹Qu - 4️⃣ Write a function to calculate  the sum  ,  product &  average of 2 Numbers .
// print that average  in the main function



#include  <stdio.h>
void cal(int a , int b);
int main(){
    int a = 3;
    int b = 5;
// Function call;
cal(a,b);
printf("%d\n" , (a,b));

    return 0 ;
}
// // Function difinition
void cal(int a , int b){
    int sum = a +b;
    int avg = (a+b) /2;
    int pro = (a * b) ;
    printf("sum is : %d  avg = %d  pro = %d\n" , sum, avg, pro);
}

#include <stdio.h>
void calculate(int a, int b, int *sum, int *avg, int *pro);
int main()
{
    int a = 5;
    int b = 23;
    int sum, avg, pro;
    calculate(a, b, &sum, &avg, &pro); // function call;
    printf("sum  = %d  avg = %d pro = %d\n", sum, avg, pro);

    return 0;
}
// Function Difinition
void calculate(int a, int b, int *sum, int *avg, int *pro)
{
    *sum = a + b;
    *avg = (a + b) / 2;
    *pro = a * b;
}

#include <stdio.h>
void calculation(int a, int b, int *sum, int *avg, int *pro);
int main()
{
    int a = 5;
    int b = 2;
    int sum, avg, pro;
    calculation(a, b, &sum, &avg, &pro); // Function call
    printf("sum = %d avg = %d , pro = %d\n", calculation);

    return 0;
}
// Function Difinition
void calculation(int a, int b, int *sum, int *avg, int *pro)
{
    *sum = a + b;
    *avg = (a + b) / 2;
    *pro = a * b;
}

//  Emoji
// 3️⃣ 4️⃣ 5️⃣ 6️⃣ 7️⃣ 8️⃣ 9️⃣ 🔟
// 1️⃣1️⃣ 1️⃣2️⃣ 1️⃣3️⃣ 1️⃣4️⃣ 1️⃣5️⃣ 1️⃣6️⃣ 1️⃣7️⃣ 1️⃣8️⃣ 1️⃣9️⃣ 2️⃣0️⃣
// 2️⃣1️⃣ 2️⃣2️⃣ 2️⃣3️⃣ 2️⃣4️⃣ 2️⃣5️⃣ 2️⃣6️⃣ 2️⃣7️⃣ 2️⃣8️⃣ 2️⃣9️⃣ 3️⃣0️⃣