Listing 9 3 TwoDimensionalArrayPointers
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/* Listing 9-3. Modified two-dimensional array program to use pointers. Purpose: To illustrate the relationship between two-dimensional arrays and pointers. Dr. Purdum, December 21, 2014 */ #define DAYSINWEEK 7 #define CHARSINDAY 10 void setup() { Serial.begin(9600); } void loop() { static char days[DAYSINWEEK][CHARSINDAY] = {"Sunday", "Monday", "Tuesday","Wednesday", "Thursday", "Friday", "Saturday"}; int i, j; // Note the dual definitions in one statement char *ptr, *base; // Some programmers hate these. Your choice. base = days[0]; // Different for N-rank arrays where N > 1 for (i = 0; i < DAYSINWEEK; i++) { ptr = base + (i * CHARSINDAY); Serial.print((int) ptr); // Show the lvalue Serial.print(" "); for (j = 0; *ptr; j++) { Serial.print(*ptr++); // Show one char } Serial.println(); } Serial.flush(); exit(0); }