C语言多线程操作多函数 冲突

Question

问题遇到的现象和发生背景

通过移动光标的方式，用两个线程执行两个不同函数分别在某列输出不同的数字。由于线程并发，输出的结果不对

问题相关代码，请勿粘贴截图

#include <pthread.h>
#include<stdio.h>
#include<windows.h>
void gotoxy(int x, int y){
    COORD pos;
    HANDLE hOutput;
    pos.X = x;
    pos.Y = y;
    hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorPosition(hOutput, pos);
}
void * fun1(void * a){
    int t=0;
    while(t<20){
        Sleep(200);
        gotoxy(10,t++);
        printf("11");
    }
}
void* fun2(void *a){
    int t=0;
    while(t<20){
        Sleep(200);
        gotoxy(1,t++);
        printf("22");
    }
}
int main(){
    pthread_t pthread1,pthread2;
    pthread_create(&pthread1,NULL,&fun1,NULL);
    pthread_create(&pthread2,NULL,&fun2,NULL);
    
    pthread_join(pthread1,NULL);
    pthread_join(pthread2,NULL);
}

运行结果及报错内容

      2211

22 11
2211
1122
22 11
2211
2211
22 11
22 11
22 11
22 11
22 11
22 11
22 11
22 11
22 11
22 11
22 11
2211
1122

我的解答思路和尝试过的方法

我想要达到的结果

Answer 1

#include <pthread.h>
#include <stdio.h>
#include <windows.h>

pthread_mutex_t m;

void gotoxy(short x, short y)
{
    COORD pos;
    HANDLE hOutput;
    pos.X = x;
    pos.Y = y;
    hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
    pthread_mutex_lock(&m);
    SetConsoleCursorPosition(hOutput, pos);
}

void *fun1(void *unused)
{
    short t = 0;
    while (t < 20)
    {
        gotoxy(10, t++);
        printf("11");
        pthread_mutex_unlock(&m);
    }
    pthread_exit(NULL);
    return NULL;
}

void *fun2(void *unused)
{
    short t = 0;
    while (t < 20)
    {
        gotoxy(1, t++);
        printf("22");
        pthread_mutex_unlock(&m);
    }
    pthread_exit(NULL);
    return NULL;
}

int main()
{
    pthread_mutex_init(&m, NULL);

    pthread_t pthread1;
    pthread_t pthread2;

    pthread_create(&pthread1, NULL, &fun1, NULL);
    pthread_create(&pthread2, NULL, &fun2, NULL);

    pthread_join(pthread1, NULL);
    pthread_join(pthread2, NULL);

    pthread_mutex_destroy(&m);

    return 0;
}