C language loops | while loop 4

Example:16
Write a C program to take input for 5 nos , check and print total even elements entered by the user.
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n%2==0)
            p++;
        i=i+1;
    }
    printf("Total even elements = %d\n",p);
    return 0;
}

Output:

Enter any no 2
Enter any no 5
Enter any no 6
Enter any no 3
Enter any no 8
Total even elements = 3

Example:17
Write a C program to take input for 5 nos , check and print total odd elements entered by the user.
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n%2==1) //or if(i%2!=0)
            p++;
        i=i+1;
    }
    printf("Total odd elements = %d\n",p);
    return 0;
}

Output:

Enter any no 3
Enter any no 6
Enter any no 2
Enter any no 5
Enter any no 7
Total odd elements = 3

Example:18
Write a C program to take input for 5 nos , check and print the following :
a. total +ve elements
b. sum of all +ve elements.
c. Average of all +ve elements
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0,s=0;
    float av;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n>0)
        {
            p++;
            s=s+n;
        }
        i=i+1;
    }
    av=(float)s/p;
    printf("Total +ve elements = %d\n",p);
    printf("Sum of all +ve elements = %d\n",s);
    printf("Average of all +ve elements = %f\n",av);
    return 0;
}

Output:

Enter any no 2
Enter any no 3
Enter any no 6
Enter any no -7
Enter any no -8
Total +ve elements = 3
Sum of all +ve elements = 11
Average of all +ve elements = 3.666667

Example:19
Write a C program to take input for 5 nos , check and print the following :
a. total -ve elements 
b. sum of all -ve elements.
c. Average of all -ve elements
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0,s=0;
    float av;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n<0)
        {
            p++;
            s=s+n;
        }
        i=i+1;
    }
    av=(float)s/p;
    printf("Total -ve elements = %d\n",p);
    printf("Sum of all -ve elements = %d\n",s);
    printf("Average of all -ve elements = %f\n",av);
    return 0;
}

Output:

Enter any no 6
Enter any no -7
Enter any no 2
Enter any no -8
Enter any no 9
Total -ve elements = 2
Sum of all -ve elements = -15
Average of all -ve elements = -7.500000

Example:20
Write a C program to take input for 5 nos , check and print the following :
a. total even elements 
b. sum of all even elements.
c. Average of all even elements
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0,s=0;
    float av;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n%2==0)
        {
            p++;
            s=s+n;
        }
        i=i+1;
    }
    av=(float)s/p;
    printf("Total even elements = %d\n",p);
    printf("Sum of all even elements = %d\n",s);
    printf("Average of all even elements = %f\n",av);
    return 0;
}

Output:

Enter any no 6
Enter any no 3
Enter any no 2
Enter any no 4
Enter any no 5
Total even elements = 3
Sum of all even elements = 12
Average of all even elements = 4.000000

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