Searching Algorithms in C

Searching Algorithms in C — a practical guide to C searching algorithms with clear examples you can reuse in real projects.

C Programming Tutorial Series (91/102). Prefer one article? Read the complete C programming tutorial.

Short description

Binary search needs a sorted array.

Linear search idea

int find(const int *a, int n, int key) {
    for (int i = 0; i < n; i++)
        if (a[i] == key) return i;
    return -1;
}