6 
Example 2:
The Pascal procedure, RealCA.p. Pascal passes low bound, high bound, and element width.
procedure RealCA(var A: array [r1..r2: integer] of array [c1..c2: integer] of real);
var
col, row: integer; begin
for row := r1 to r2 do for col := c1 to c2 do
if row = col then A[row, col] := 1.0
else
A[row, col] := 0.0
end; { RealCA }
The C main program, RealCAMain.c. Array M has 2 rows of 3 columns each. c1 and c2 are the first and last columns. r1 and r2 are the first and last rows. wc is the width of a column element (smallest) and is equal to sizeof( M[0][0] ). wr is the width of a row element (next largest) and is equal to
#include <stdio.h>
#define NC 3 #define NR 2
extern void RealCA(double [][NC], int, int, int, int, int);
int main(void) |
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{ |
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double | M[NR][NC]; | ||
int |
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| col, c1, c2, row, r1, r2, wc, wr; |
c1 | = | 0; |
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r1 | = | 0; |
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c2 | = | NC - 1; |
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r2 | = | NR - 1; |
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wc = | sizeof(M[0][0]); | ||
wr = | (c2 - c1 + 1) * wc; | ||
RealCA(M, r1, r2, wr, c1, c2);
for (row = r1; row <= r2; row++) { printf("\n");
for (col = c1; col <= c2; col++) printf("%4.1f", M[row][col]);
};
printf("\n");
}
The | 103 |