HW update

HW6_thread/README.md

+# 실전코딩2
+
+## HW6_thread
+
+## 점수의 합과 평균 출력 하는 thread
+## 점수를 성적순으로 sorting 하는 thread
+
+## 결과 사진
+![1](./image/1.png)
\ No newline at end of file

HW6_thread/input.txt

+55
+14
+17
+49
+28
+19
+39
+45
+68
+10
+1
+5
+7
+9
+11
+23
+24
+29
+31
+38
+81
+86
+84
+94
+92
+67
+73
+79
+99
+97
\ No newline at end of file

HW6_thread/thread.c

+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <pthread.h>
+#define size 30
+
+int max = 0;
+int sum = 0;
+short int score[size];
+
+int compare(const void* a, const void* b);
+
+int compare(const void* a, const void* b)
+{
+        if (*(short*)a > * (short*)b)
+                return 1;
+        else if (*(short*)a < *(short*)b)
+                return -1;
+        else
+                return 0;
+}
+
+void* score_thread(void* arg)
+{
+
+        printf("score_Thread Start!!\n");
+        for (int i = 0; i < size; i++) {
+                scanf("%hd", &score[i]);
+        }
+        for(int i = 0; i < size; i++) {
+                sum += score[i];
+                sleep(1);
+        }
+        printf("평균 = %d\nSum = %d\n", sum/size, sum);
+        printf("score_Thread End!!\n");
+
+        pthread_exit(arg);
+}
+
+void* sort_thread(void* arg)
+{
+        printf("sort_Thread Start!!\n");
+        qsort(score, size, sizeof(score[0]), compare);
+        printf("성적순 정렬:");
+        for (int i = size-1; i >= 0; i--) {
+                printf(" %hd", score[i]);
+        }
+        printf("\n");
+        printf("sort_Thread End!!\n");
+
+        pthread_exit(arg);
+}
+
+int main(void)
+{
+        pthread_t tid;
+        pthread_t tid2;
+        int status;
+        int status2;
+
+        printf("Main_Thread Start!!\n");
+        status = pthread_create(&tid, NULL, score_thread, (void*)3);
+        status2 = pthread_create(&tid2, NULL, sort_thread, (void*)3);
+
+        if (status != 0) {
+                perror("thread create");
+                exit(1);
+        }
+        if (status != 0) {
+                perror("thread create");
+                exit(1);
+        }
+        for (int i = 1; i <= 4; i++) {
+                sleep(1);
+        }
+
+        printf("Main_Thread End!!\n");
+        pthread_exit(NULL);
+        return 0;
+
+}