Credits for Lecture and Authoring
Introduction
Sample Picture
Rules
Dimension Form
Scan-w/2for
Output-w/2for
Example Problem
Example Solution
Function Rules
Example 2
Example 3

Authored by: Lex Jacobson and John Even

Faculty Supervisor: Al Day

Some material derived from lessons authored by Dr. Larry Genalo

HTML documentation by: Julie Sandberg

Date last updated: 7/24/96

Subscripted Variable Name: A C variable name common to many variables

Subscripted Array: A systematic diagrammatical representation of a subscripted variable

1. Subscripted variables can be double, integer, or character.

2. The maximum number of subscripts is dictated by the compiler vendor. Twelve is common.

3. Arithmetic expressions may be used for subscripts.

4. Subscripts must be integer valued.

5. A statement must be included in your program which sets aside storage space (dimensions) for your arrays.

Arrays are declared with the other variables in the program.

		int n, m;
		double x[5][6];
		FILE *inp; 
		inp = fopen("IN.DAT","r");
		for (n = 0; n < 5; ++n) {
		for (m = 0; m < 6; ++m)
		    fscanf (inp, "%lf", &x[n][m]);
		}
		fclose (inp);

		int n, m;
		double x[5][6];
		FILE *outp;
		outp = fopen("OUT.DAT","w");
		for (n = 0; n < 5; ++n) {
		    for (m = 0; m < 6; ++m) 
			fprintf (outp, "%10.4f", x[n][m]);
		    fprintf (outp, "\n");
		}
		fclose (outp);

Multi-dimensional arrays must be fully dimensioned in the "calling" module, and partially dimensioned in the source function.

As always, the name of the array may be different in each module, but it must be in the same position in the list and agree in type