C言語の文字列｜char配列・strcpy・strcmp

C言語の文字列｜char配列・strcpy・strcmp (c言語 文字列): practical C programming guide with runnable standard C17 source code that you can edit, compile, and test directly in your browser.

1. C言語の文字列｜char配列・strcpy・strcmp

This guide covers c言語 文字列 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 文字列 — Syntax & Best Practices

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

#include <stdio.h>
#include <string.h>

int main(void) {
    char greeting[32] = "Hello";
    strcat(greeting, ", C!");
    printf("%s (len=%zu)\n", greeting, strlen(greeting));
    return 0;
}