C program to Find Total of Marks using Structure

/*
Write a function to enter Roll no, marks of the three subject for 3 students and find total obtained by each student.
*/

#include <stdio.h>

struct student
{
int rollno;
int marks[3];
}s[3];

int main(void) 
{

int i,j,total=0;
for(i=0;i<3;i++)
{

total=0;
printf("Enter Roll No : ");
scanf("%d",&s[i].rollno);

for(j=0;j<3;j++)
{
printf("Enter Marks for Subject [%d]",j+1);
scanf("%d",&s[i].marks[j]);
total=total+s[i].marks[j];
}

printf("\n Total Marks of Student Roll No [%d] : %d",s[i].rollno,total);

}

return 0;
}