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HelloSorting.ino
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HelloSorting.ino
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/*
* Quick demo of one of the sorting functions, in this example,
* shellSortKnuth(). All the other sorting algorithms have the exact same
* function signature. The compiler is able to infer the type of the data, so
* you don't normally need to specify the template type to the shellSortKnuth()
* function.
*
* Expected output:
*
* Unsorted: 234 19 95 219 255 132 27 194 83 96 245 161 228 205 193 215 101 216
* 120 95
*
* Sorted using implicit ascending: 19 27 83 95 95 96 101 120 132 161 193 194
* 205 215 216 219 228 234 245 255
*
* Sorted using function pointer: 19 27 83 95 95 96 101 120 132 161 193 194 205
* 215 216 219 228 234 245 255
*
* Sorted using lambda expression: 19 27 83 95 95 96 101 120 132 161 193 194 205
* 215 216 219 228 234 245 255
*
* Reverse sorted using lambda expression: 255 245 234 228 219 216 215 205 194
* 193 161 132 120 101 96 95 95 83 27 19
*/
#include <Arduino.h>
#include <AceSorting.h>
using ace_sorting::shellSortKnuth;
// ESP32 does not define SERIAL_PORT_MONITOR
#if !defined(SERIAL_PORT_MONITOR)
#define SERIAL_PORT_MONITOR Serial
#endif
const uint16_t ARRAY_SIZE = 20;
int array[ARRAY_SIZE];
// Print given array.
void printArray(int* array, uint16_t arraySize) {
for (uint16_t i = 0; i < arraySize; i++) {
SERIAL_PORT_MONITOR.print(array[i]);
SERIAL_PORT_MONITOR.print(' ');
}
SERIAL_PORT_MONITOR.println();
}
// Fill array with random numbers.
void fillArray(int* array, uint16_t arraySize) {
for (uint16_t i = 0; i < arraySize; i++) {
array[i] = random(256);
}
}
bool lessThan(int a, int b) {
return a < b;
}
//-----------------------------------------------------------------------------
void setup() {
#if ! defined(EPOXY_DUINO)
delay(1000);
#endif
SERIAL_PORT_MONITOR.begin(115200);
while (!SERIAL_PORT_MONITOR); // Leonardo/Micro
// Attempt to get a random seed using the floating analog pin.
#if defined(EPOXY_DUINO)
randomSeed(micros());
#else
randomSeed(analogRead(A0));
#endif
SERIAL_PORT_MONITOR.print("Unsorted: ");
fillArray(array, ARRAY_SIZE);
printArray(array, ARRAY_SIZE);
SERIAL_PORT_MONITOR.println();
// Use default ascending sort order.
SERIAL_PORT_MONITOR.print("Sorted using implicit ascending: ");
shellSortKnuth(array, ARRAY_SIZE);
printArray(array, ARRAY_SIZE);
SERIAL_PORT_MONITOR.println();
// Use function pointer.
SERIAL_PORT_MONITOR.print("Sorted using function pointer: ");
shellSortKnuth(array, ARRAY_SIZE, lessThan);
printArray(array, ARRAY_SIZE);
SERIAL_PORT_MONITOR.println();
// Use lambda expression
SERIAL_PORT_MONITOR.print("Sorted using lambda expression: ");
shellSortKnuth(array, ARRAY_SIZE, [](int a, int b) { return a < b; });
printArray(array, ARRAY_SIZE);
SERIAL_PORT_MONITOR.println();
// Reverse sort using lambda expression
SERIAL_PORT_MONITOR.print("Reverse sorted using lambda expression: ");
shellSortKnuth(array, ARRAY_SIZE, [](int a, int b) { return a > b; });
printArray(array, ARRAY_SIZE);
SERIAL_PORT_MONITOR.println();
#if defined(EPOXY_DUINO)
exit(0);
#endif
}
void loop() {}