Question

How to check whether an array contains unique values in C

Answer 1

#include <stdio.h>
#include <stdbool.h>

bool hasUniqueValues(int arr[], int size) {
    for (int i = 0; i < size; i++) {
        for (int j = i + 1; j < size; j++) {
            if (arr[i] == arr[j]) {
                return false; // Duplicate found
            }
        }
    }
    
    return true; // All values are unique
}

int main() {
    int arr[] = {1, 8, 9, 0, 3, 4, 6};
    int size = sizeof(arr) / sizeof(arr[0]);

    // Check for unique values
    if (hasUniqueValues(arr, size)) {
        printf("The array contains unique values.\n");
    } else {
        printf("The array contains duplicates.\n");
    }

    return 0;
}


/*
run:

The array contains unique values.


*/

 

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