98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
#include <stdio.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <string.h>
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pthread_rwlock_t rwlock = PTHREAD_RWLOCK_INITIALIZER;
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int money = 1000; // 存款余额
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int exit_flag = 0; // 退出标志
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void *task1(void *data)
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{
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while (1)
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{
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pthread_rwlock_wrlock(&rwlock); // 加写锁
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// 查询余额
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printf("存款任务-余额: %d\n", money);
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usleep(200 * 1000);
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// 从键盘读取存入的金额
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printf("请输入存款金额 (输入 0 结束存款): ");
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fflush(stdout);
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int m;
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scanf("%d", &m);
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if (m == 0)
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{
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exit_flag = 1;
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pthread_rwlock_unlock(&rwlock); // 解锁
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break;
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}
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money += m;
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// 修改余额并打印结果
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printf("存款成功, 余额为 %d\n", money);
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pthread_rwlock_unlock(&rwlock); // 解锁
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}
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pthread_exit(NULL);
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}
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void *task2(void *data)
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{
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while (1)
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{
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pthread_rwlock_wrlock(&rwlock); // 加写锁
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// 查询余额
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printf("取款任务-余额: %d\n", money);
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usleep(200 * 1000);
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// 从键盘读取取出的金额
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printf("请输入取款金额 (输入 0 结束取款): ");
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fflush(stdout);
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int m;
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scanf("%d", &m);
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if (m == 0)
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{
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exit_flag = 1;
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pthread_rwlock_unlock(&rwlock); // 解锁
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break;
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}
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if (money >= m)
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{
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money -= m;
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// 修改余额并打印结果
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printf("取款成功, 余额为 %d\n", money);
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}
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else
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{
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printf("取款失败, 余额不足\n");
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}
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pthread_rwlock_unlock(&rwlock); // 解锁
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}
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pthread_exit(NULL);
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}
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int main(int argc, char const *argv[])
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{
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while (1)
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{
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pthread_t t1, t2;
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pthread_create(&t1, NULL, task1, NULL);
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pthread_create(&t2, NULL, task2, NULL);
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while (1)
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{
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pthread_rwlock_rdlock(&rwlock);
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if (exit_flag)
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{
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pthread_rwlock_unlock(&rwlock);
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break;
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}
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pthread_rwlock_unlock(&rwlock);
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}
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pthread_join(t1, NULL);
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pthread_join(t2, NULL);
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}
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pthread_rwlock_destroy(&rwlock);
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return 0;
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}
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