tasks a-s

Task/Pascals-triangle/C/pascals-triangle-1.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+
+void pascaltriangle(unsigned int n)
+{
+  unsigned int c, i, j, k;
+
+  for(i=0; i < n; i++) {
+    c = 1;
+    for(j=1; j <= 2*(n-1-i); j++) printf(" ");
+    for(k=0; k <= i; k++) {
+      printf("%3d ", c);
+      c = c * (i-k)/(k+1);
+    }
+    printf("\n");
+  }
+}
+
+int main()
+{
+  pascaltriangle(8);
+  return 0;
+}

Task/Pascals-triangle/C/pascals-triangle-2.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+#define D 32
+int pascals(int *x, int *y, int d)
+{
+	int i;
+	for (i = 1; i < d; i++)
+		printf("%d%c", y[i] = x[i - 1] + x[i],
+			i < d - 1 ? ' ' : '\n');
+
+	return D > d ? pascals(y, x, d + 1) : 0;
+}
+
+int main()
+{
+	int x[D] = {0, 1, 0}, y[D] = {0};
+	return pascals(x, y, 0);
+}

Task/Pascals-triangle/C/pascals-triangle-3.c

@@ -0,0 +1,16 @@
+void triangleC(int nRows) {
+    if (nRows <= 0) return;
+    int *prevRow = NULL;
+    for (int r = 1; r <= nRows; r++) {
+        int *currRow = malloc(r * sizeof(int));
+        for (int i = 0; i < r; i++) {
+            int val = i==0 || i==r-1 ? 1 : prevRow[i-1] + prevRow[i];
+            currRow[i] = val;
+            printf(" %4d", val);
+        }
+        printf("\n");
+        free(prevRow);
+        prevRow = currRow;
+    }
+    free(prevRow);
+}