C言語の関数の作り方｜引数と戻り値

C言語の関数の作り方｜引数と戻り値 (c言語 関数): practical C programming guide with runnable standard C17 source code that you can edit, compile, and test directly in your browser.

1. C言語の関数の作り方｜引数と戻り値

This guide covers c言語 関数 in standard C (C17) with clear syntax rules and practical compiler patterns. You can run and modify the complete C program below in the online GCC compiler without installing a local IDE.

2. c言語 関数 — Syntax & Best Practices

When working with c言語 関数, always compile with -Wall -Wextra, initialize variables before reading them, and verify input/boundary conditions to prevent undefined behavior.

#include <stdio.h>

int add(int a, int b) {
    return a + b;
}

int main(void) {
    printf("Result = %d\n", add(15, 27));
    return 0;
}