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15: Problem statement:
Write C++ program to store first year percentage of students in array. Sort array of floating point numbers in ascending order using quick sort and display top five scores.
#include<stdio.h>

void selection(float[],int);
void bubble(float[],int);

void main()
{
    int n,i,op;
    float a[30];

    do
    {
        printf("\n 1)Bubble sort \n 2)Selection sort \n 3)Quit");
        printf("\n Enter your choice :");
        scanf("%d", &op);
        if(op==1)
        {
            printf("\n Enter no. of elements :");
            scanf("%d",&n);
            printf("\n Enter array elements :");
            for(i=0;i<n;i++)
                scanf("%f",&a[i]);
            bubble(a,n);
            printf("\n Sorted array is :");
            for(i=n-1;i>=n-5;i--)
                printf("%7.2f",a[i]);
        }
        if(op==2)
        {
            printf("\n Enter no. of elements :");
                        scanf("%d",&n);
                        printf("\n Enter array elements :");
                        for(i=0;i<n;i++)
                            scanf("%f",&a[i]);
                        selection(a,n);
                        printf("\n Sorted array is :");
                        for(i=n-1;i>=n-5;i--)
                            printf("%7.2f",a[i]);
        }
    }while(op!=3);
}


void bubble(float a[], int n)
{
    int i,j;
    float temp;
    for(i=1; i<n;i++)
        for(j=0;j<n-i;j++)
            if(a[j]>a[j+1])
            {
                temp=a[j];
                a[j]=a[j+1];
                a[j+1]=temp;

            }
}


void selection(float a[],int n)
{
    int i,j,k;
    float temp;

    for(i=0;i<n-1;i++)
    {
        k=i;
        for(j=i+1;j<n;j++)
            if(a[j]<a[k])
                k=j;
        if(k !=i)
        {
            temp=a[i];
            a[i]=a[k];
            a[k]=temp;

        }
    }
}


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