Question

How to find all pythagorean triples (a^2 + b^2 = c^2) from an array in C

Answer 1

#include <stdio.h>

void PrintPythagoreanTriples(int arr[], int size) {
    for (int i = 0; i < size - 2; i++) {
        for (int j = i + 1; j < size - 1; j++) {
            for (int k = i + 2; k < size; k++) {
                int a = arr[i];
                int b = arr[j];
                int c = arr[k];
                if (a * a + b * b == c * c) {
                    printf("%d %d %d\n", a, b, c);
                }
            }
        }
    }
}

int main()
{
    int arr[] = { 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    int size = sizeof(arr) / sizeof(arr[0]);

    PrintPythagoreanTriples(arr, size);

    return 0;
}




/*
run:

3 4 5
6 8 10

*/

 

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