Pairing Up Two Arrays (the zip operation)

This lesson covers pairing up two arrays in C, so you understand a way to handle multiple pieces of data together. It's for anyone searching "C array pairing implementation."

Combining two corresponding arrays — like "an array of names" and "an array of scores" — into pairs, one at a time, is called a zip operation. C has no dedicated function for this, so you combine them one at a time with a for loop.

The example uses a shared index, for (int i = 0; i < 3; i++), pairing up names[i] and scores[i] and displaying them with printf(). Accessing both arrays by the same index is the basic idea.

A common early mistake is not handling the case where the two arrays have different lengths. Since C requires you to manage element counts yourself, you need to confirm both arrays' element counts match beforehand.

In real projects, this idea is applied often whenever you need to process several related pieces of data together.

📖 Reference code

#include <stdio.h>

int main(void) {
    const char *names[] = {"Alice", "Bob", "Charlie"};
    int scores[] = {88, 95, 72};
    for (int i = 0; i < 3; i++) {
        printf("(%s, %d)\n", names[i], scores[i]);
    }
    return 0;
}

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🧪 This site can't compile or run C directly, so it checks on the spot whether what you typed matches the reference code (scoring happens entirely in your browser — nothing is sent anywhere).