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Lsn3AlS.c

@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+int board [5][5]=
+{
+    {0,0,0,0,0},
+    {0,0,0,0,0},
+    {0,0,0,0,0},
+    {0,0,0,0,0},
+    {0,0,0,0,0}
+};
+
+int sqr1 (int a, int b)
+{
+    if (b==1) return a;
+    if (b==0) return 1;
+    else
+    {
+        return a*sqr1(a,b-1);
+    }
+}
+
+int sqr2(int a, int b)
+{   
+    if(b==1)return a;
+    if (b==0)a=1;
+    if (b%2==0)
+    {
+        return sqr2(a*a,b/2);
+    }
+    if (b%2!=0)
+    {
+        return a*sqr2(a,b-1);
+    }
+
+}
+
+int bin2(int a)
+{
+    while(a>0)
+    {
+    bin2(a/2);
+    if (a%2==0) return printf("0");
+    if (a%2!=0) return printf("1");
+    }
+
+}
+
+
+int king (int x,int y,int *board[x][y])
+{
+    if(board[x][y]!=0)return 0;
+    if (x==0 && y==0)
+    {
+        return 0;
+    }
+    if (x==0^y==0)
+    {
+        return 1;
+    }
+
+    else return king (x,y-1,board)+king (x-1,y,board);
+}
+
+
+int main () 
+{
+
+    printf("%d",sqr1(2,4));
+    printf("\n");
+    printf("%d",sqr2(2,7));
+    printf("\n");
+    bin2(100);
+    printf("\n\n");
+    const int x=5;
+    const int y=5;
+
+
+    for (int y = 0; y < 5; ++y) {
+        for (int x = 0; x < 5; ++x)
+            printf("%5d", king(3,3,board));
+        printf("\n");
+    }
+
+    return 0;
+}