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Write a program to store the name, roll number and marks in three subjects of n students using structure. Generate a merit list with respect to the total marks scored.
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#include<stdio.h>
struct student
{
char name[20];
int roll_no;
int physics,chem,maths,total;
};
void main ()
{
struct student s[100],temp;
int n,i,j;
clrscr();
printf("Enter the number of students");
scanf("%d",&n);
for(i=0;i<=n-1;i++)
{
    printf("Enter the student's name, roll      number and marks in three subjects:");
    scanf("%s %d %d %d %d",s[i].name,   &s[i].roll_no,&s[i].physics,&s[i].chem,&s[i].maths; s[i].total=s[i].physics+s[i].chem+s[i].maths;
}
for(i=0;i<=n-1;i++)
{
    for(j=0;j<=n-2;j++)
    {
        if(s[j].total<s[j+1].total)
        {
            temp=s[j];
            s[j]=s[j+1];
            s[j+1]=temp;
        }
    }
}
printf("Name\tRollNo\tPhysics\tChem\tMaths\tTotal   \n");
printf("----------------------------------------------\n");
for(i=0;i<=n-1;i++)
{
printf("%s\t%d\t%d\t%d\t%d\t%d\n",s[i].name,s[i].r  oll_no,s[i].physics,s[i].chem,s[i].maths,s[i].total);
}
 }
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