Question

C Programming Language

2(a) Define a struct with 1 int array named i, 1 float array named f, and one double array named d, each of size M.

(b)Declare array x with N of those structs.

(c)Write a void function to traverse array x (using a pointer) assigning to each element in each array d (in each struct in array x) the sum of the corresponding elements in arrays i and f (in the same struct). Use 3 pointers (of appropriate types) to traverse the arrays.

(d)Write an int function to traverse array x (using an index) searching for a number received as a double argument. The function needs to check the values in each array (i, f, and d) in each struct in array x. The function returns 1 if the value is found, or -1 if the value is not there. Search the three arrays together, one index at a time.

Answer 1

#define M 10
#define N 5

Answer a )
============
typedef struct
{
   int i[M];
   float f[M];
   double d[M];
}data;

Answer b)
=========
data x[N];

answer c)
=========
void traverse(data *x)
{
   int *ip;
   float *fp;
   double *dp;
   int i, j;
   for(i = 0; i < N; i++){
       ip = x->i;
       fp = x->f;
       dp = x->d;
       for(j = 0; j < M; j++){
           *dp = (*ip) + (*fp);
           ip++;
           fp++;
           dp++;
       }
       x++;
   }
}

answer d)
=======
int find(data x[], double val)
{
   int i, j;
   for(i = 0; i < N; i++){
       for(j = 0; j < M; j++){
           if(x[i].i[j] == val || x[i].f[j] == val || x[i].d[j] == val)
               return 1;
       }
   }
   return -1;//not found
}