TA release HW1

1/exp1/exp1_1.cpp

@@ -0,0 +1,18 @@
+#include "stdio.h"  
+
+int main() {  
+    FILE *infile ,*outfile;  
+    int i;  
+    int *buffer;  
+    buffer = new int[2];  
+    infile = fopen("a.in", "rb");  
+    fread(buffer, 4, 2, infile);  
+    fclose(infile);  
+    outfile = fopen("a.out", "wb");  
+    fwrite(buffer, 4, 2, outfile);  
+    fclose(outfile);  
+    scanf("%d", &i);  
+    i = i + 10;
+    printf("%d", i);  
+    return 0;
+}  

1/exp1/exp1_2.cpp

@@ -0,0 +1,12 @@
+#include "stdio.h"
+
+int main() {
+  int i, j, temp;
+  scanf("%d", &i);
+  scanf("%d", &j);
+  i = -i;
+  if(j < 0) j = -j;
+  for(temp = 0; temp < j; ++temp) i += 1;
+  printf("%d",i);
+  return 0;
+}

1/exp1/exp1_3.cpp

@@ -0,0 +1,15 @@
+#include "stdio.h"
+
+int main() {
+    int *a, n, i, t;
+    scanf("%d", &n);
+    a = new int [n];
+    for(i = 0; i < n; i++) scanf("%d",&a[i]);
+    for(i = 0; i < n / 2; i++) {
+        t = a[i] + 1;
+        a[i] = a[n - i - 1] + 1;
+        a[n - i - 1] = t;
+    }
+    for(i = 0;i < n; i++) printf("%d", a[i]);
+    return 0;
+}

1/exp1/exp1_4.cpp

@@ -0,0 +1,18 @@
+#include "stdio.h"
+
+int Hanoi(int n)
+{
+    if (n == 1) {   // 基准情形
+        return 1;
+    } else {        // 递归情形
+        return 2 * Hanoi(n - 1) + 1;
+    }
+}
+
+int main()
+{
+    int n;
+    scanf("%d", &n);
+    printf("%d", Hanoi(n));
+    return 0;
+}