quick guide

C permits the use of arrays as structure members.we can
use single or multidimensional arrays of type int or float.
Ex: struct marks
{
int number;
float subject[3];
student[2];
}
here,the member subject contains 3 elements,subject[0],
subject[1] and subject[2].These elements can be accessed
using appropriate subscripts. For example ,the name
student[1].subject[2]; would refer to the marks obtained
in the third subject by the second student.

We can use arrays inside the structures. We can use single
or multidimensional arrays of type int or float.For example,
the following structure declaration is valid.
struct marks
{
int number;
float subject[3];
}student[3];

Here,the member subject contains 3 elements,subject[0],
subject[1] and subject[2].These elements can be accessed
using subscripts like student[1].subject[2];would refer to
the marks obtained in the third subject by the second
student.
/*Arrays Within The Structures*/
main()
{
struct marks
{
int sub[3];
int total;
};
static struct marks student[3]={45,67,81,0,75,53,
69,0,57,36,71,0};
static struct marks total;
int i,j;
for(i=0;i<=2;i++)
{
for(j=0;j<=2;j++)
{
student[i].total += student[i].sub[j];
total.sub[j] +=student[i].sub[j];
}
total.total +=student[i].total;
}
printf("STUDENT TOTAL \n\n");
for(i=0;i<=2;i++)
printf("student[%d] %d\n",i+1,student[i].total);
printf("SUBJECT TOTAL \n\n");
for(j=0;j<=2;j++)
printf("subject-%d %d\n",j+1,total.sub[j]);
printf("\n Grand Total = %d\n",total.total);
}
OUTPUT:
STUDENT TOTAL
student[1] 193
student[1] 197
student[1] 164
SUBJECT TOTAL
subject-1 177
subject-2 156
subject-3 221
Grand Total =554