unit test

demo/hello.c

@@ -1,5 +0,0 @@
-int printf(char* format, ...);
-
-int main() {
-    printf("hello world %d\n", 42);
-}

demo/parse.c

@@ -1,19 +0,0 @@
-int getchar();
-
-
-int is_digit(int ch) {
-    return '0' <= ch && ch <= '9';
-}
-
-int parse_int(int ch) {
-    int num = ch - '0';
-    while (is_digit(ch = getchar())) {
-        num = num * 10;
-        num = num + ch - '0';
-    }
-    return num;
-}
-
-int main() {
-    return parse_int(getchar());
-}

demo/sort.c

@@ -1,30 +0,0 @@
-int printf(char* format, ...);
-int scanf(char* format, ...);
-
-void sort(int a[], int n) {
-    for (int i = 0; i < n; i++) {
-        for (int j = i + 1; j < n; j++) {
-            if (a[i] > a[j]) {
-                int t = a[i];
-                a[i] = a[j];
-                a[j] = t;
-            }
-        }
-    }
-}
-
-int main() {
-    int n;
-    int a[100];
-    printf("Enter the number of elements in the array: ");
-    scanf("%d", &n);
-    printf("Enter the elements of the array: ");
-    for (int i = 0; i < n; i++) {
-        scanf("%d", &a[i]);
-    }
-    sort(a, n);
-    for (int i = 0; i < n; i++) {
-        printf("%d ", a[i]);
-    }
-    printf("\n");
-}