P190. Program to store 5 student database which contains 3 information ( roll no – name – marks ) in unsorted order, ask the user for input in which way he/she needs the data to be sorted. 1 – Roll No 2 – Name 3 – Marks

 #include<stdio.h>

#include<string.h>

struct stu

{

    int roll;

    char name[10];

    float t_marks;

};

 

void main()

{

    struct stu v[5],temp;

    int i,j,ele,choice;

    ele=sizeof(v)/sizeof(v[0]);

 

    for(i=0;i<ele;i++)

    {

    printf("Enter roll number : ");

    scanf("%d",&v[i].roll);

    printf("Enter name : ");

    scanf(" %s",v[i].name);

    printf("Enter total marks : ");

    scanf("%f",&v[i].t_marks);

    printf("\n");

    }

    printf("\n");

    printf("BEFORE SORTING\n");

    for(i=0;i<ele;i++)

    {

    printf("%d %s %f \n",v[i].roll,v[i].name,v[i].t_marks);

    }

 

    printf("\n");

    while(1)

    {

    printf("Please select an option\n 1 - Sort using Roll Number\n 2 - Sort using Name\n 3 - Sort using Total Marks\n ");

    printf("Enter choice : ");

    scanf("%d",&choice);

 

    switch(choice)

    {

        case 1 :

        for(i=0;i<ele-1;i++)

        {

            for(j=0;j<ele-i-1;j++)

            {

                if(v[j].roll>v[j+1].roll)

                {

                    temp=v[j];

                    v[j]=v[j+1];

                    v[j+1]=temp;

                }

            }

        }

        break;

 

        case 2 :

        for(i=0;i<ele-1;i++)

        {

            for(j=0;j<ele-i-1;j++)

            {

                if((strcmp(v[j].name,v[j+1].name)>0))

                {

                    temp=v[j];

                    v[j]=v[j+1];

                    v[j+1]=temp;

                }

            }

        }

        break;

 

        case 3 :

        for(i=0;i<ele-1;i++)

        {

            for(j=0;j<ele-i-1;j++)

            {

                if(v[j].t_marks > v[j+1].t_marks)

                {

                    temp=v[j];

                    v[j]=v[j+1];

                    v[j+1]=temp;

                }

            }

        }

        break;

 

 

    }

    printf("\n");

    printf("AFTER SORTING\n");

    for(i=0;i<ele;i++)

    {

    printf("%d %s %f \n",v[i].roll,v[i].name,v[i].t_marks);

    }

    printf("\n");

    }

}