Programing C Lab

 Calculate Average by using Array

//Average of n Numbers 

#include <stdio.h>

int main()

 {

    int a[100],n,i;

    float avg=0,sum=0;

    printf("How many numbers do you want to calculate for average: ");

    scanf("%d", &n);

    printf("Enter your numbers: ");

    for(i=1;i<=n;i++)

     {

        scanf("%d", &a[i]);

        sum=sum+a[i];

    }

    avg=sum/n;

    printf("The average is %f",avg);

    return 0;

}

Swaping 

#include <stdio.h>

int main() {

  double a, b;

  printf("Enter a: ");

  scanf("%lf", &a);

  printf("Enter b: ");

  scanf("%lf", &b);

// a = (initial_a - initial_b)

  a = a - b;   

  // b = (initial_a - initial_b) + initial_b = initial_a

  b = a + b;

  // a = initial_a - (initial_a - initial_b) = initial_b

  a = b - a;

  // %.2lf displays numbers up to 2 decimal places

  printf("After swapping, a = %.2lf\n", a);

  printf("After swapping, b = %.2lf", b);

  return 0;

}

Even or Odd

#include <stdio.h>

int main() {

    int num;

    printf("Enter an integer: ");

    scanf("%d", &num);

    // true if num is perfectly divisible by 2

    if(num % 2 == 0)

        printf("%d is even.", num);

    else

        printf("%d is odd.", num);

    

    return 0;

}

large number Between 2 number

    // Online C compiler to run C program online

#include <stdio.h>

int main() {

    int a,b;

    printf("Enter the value of a: ");

    scanf("%d",&a);

    printf("Enter the value of b: ");

    scanf("%d", &b);

    if(a>b)

    printf("Value of a is largest.");

    else

    printf("Value of b is largest ");

    

    return 0;

}

Positive or Negative  

#include <stdio.h>

int main() {

    double num;

    printf("Enter a number: ");

    scanf("%lf", &num);

    if (num < 0.0)

        printf("You entered a negative number.");

    else if (num > 0.0)

        printf("You entered a positive number.");

    else

        printf("You entered 0.");

    return 0;

}