C언어의 특징과 응용분야

#include <stdio.h>
#include <unistd.h>

int main() {
    pid_t pid;
    
    pid = fork();
    
    if (pid < 0) {
        printf("Error in forking process.");
    } else if (pid == 0) {
        printf("Child process is created.
");
    } else {
        printf("Parent process is running.
");
    }
    
    return 0;
}

#include <avr/io.h>

int main() {
    DDRB = 0xff; // 设置B端口为输出端口
    
    while(1) {
        PORTB ^= (1 << PB0); // 翻转PB0引脚的状态
        _delay_ms(500); // 延时500ms
    }
    
    return 0;
}

#include <stdio.h>

void quickSort(int arr[], int low, int high) {
    if (low < high) {
        int pivot = arr[high];
        int i = low - 1;
        
        for (int j = low; j < high; j++) {
            if (arr[j] < pivot) {
                i++;
                int temp = arr[i];
                arr[i] = arr[j];
                arr[j] = temp;
            }
        }
        
        int temp = arr[i+1];
        arr[i+1] = arr[high];
        arr[high] = temp;
        
        int pi = i + 1;
        
        quickSort(arr, low, pi - 1);
        quickSort(arr, pi + 1, high);
    }
}

int main() {
    int arr[] = {12, 34, 5, 23, 67, 3};
    int n = sizeof(arr) / sizeof(arr[0]);
    
    quickSort(arr, 0, n - 1);
    
    printf("Sorted array: ");
    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    
    return 0;
}