Parallel arrays
int itemNumber[10]
[0]
1234
[1]
6529
[2]
9983
[3]
4567
[4]
2020
[5]
9987
[6]
1212
[7]
3948
[8]
0098
[9]
8876
double price[10]
[0]
386.32
[1]
0.12
[2]
12.34
[3]
99.99
[4]
99.99
[5]
23.99
[6]
0.99
[7]
386.32
[8]
8.45
[9]
0.13
Suppose we want to find the price of item 2020.
Given the function:
int search( int theArray[ ], int arrSize,
int target )
/* search theArray (of size arrSize) for the
first occurrence of target.
Return the index if it is there.
Return -1 if it does not occur in
theArray */
We can use it:
int location;
location = search(itemNumber, 10, 2020);
if (location != -1)
printf ("It costs $%0.2lf.\n",
price[location]);
else
printf("We do not have that item..\n");