C言語で乱数を生成する方法｜rand・srand

C言語で乱数を生成する方法｜rand・srand (c言語 乱数): practical C programming guide with runnable standard C17 source code that you can edit, compile, and test directly in your browser.

1. C言語で乱数を生成する方法｜rand・srand

This guide covers c言語 乱数 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 乱数 — Syntax & Best Practices

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

#include <stdio.h>
#include <stdlib.h>

int main(void) {
    srand(42);
    for (int i = 0; i < 3; ++i) {
        printf("%d\n", (rand() % 100) + 1);
    }
    return 0;
}