C stdlib rand() 函式

示例

顯示 10 個介於 1 和 100 之間的隨機數

// Initialize the randomizer using the current timestamp as a seed
// (The time() function is provided by the <time.h> header file)
srand(time(NULL));

// Generate random numbers
for (int i = 0; i < 10; i++) {
  int num = rand() % 100 + 1;
  printf("%d ", num);
}