Initial commit

Author: Ryuichi KAWAMATA

rkmathi/2-1.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+int main(void)
+{
+    int n, i, j;
+    printf("Input number (>=1): ");
+    scanf ("%d", &n);
+    printf("n = %d\n", n);
+    for (i=1; i<=n; i++) {
+        for (j=1; j<=n-i; j++) {
+            printf(" ");
+        }
+        for (j=1; j<=2*i-1; j++) {
+            printf("*");
+        }
+        printf("\n");
+    }
+    return 0;
+}

rkmathi/2-2.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+int main(void)
+{
+    int n, tmp, digit;
+    printf("Input number: ");
+    scanf("%d", &n);
+    tmp = n;
+    digit = 0;
+    while (tmp > 0) {
+        tmp /= 10;
+        ++digit;
+    }
+    printf("%d is the %d-digit number\n", n, digit);
+    return 0;
+}

rkmathi/2-2.txt

@@ -0,0 +1,6 @@
+5
+3.0 1.0 4.0 1.0 5.0 9.0
+2.0 6.0 5.0 3.0 5.0 8.0
+9.0 7.0 9.0 3.0 2.0 3.0
+8.0 4.0 6.0 2.0 6.0 4.0
+3.0 3.0 8.0 3.0 2.0 7.0

rkmathi/2-3.c

@@ -0,0 +1,20 @@
+#include  <stdio.h>
+int main(void)
+{
+    int n, i, j, tmp, digit, ans[100];
+    char str[100];
+    printf("Input number: ");
+    scanf("%d", &n);
+    tmp = n;
+    digit = 0;
+    sprintf(str, "%d", n);
+    while (tmp > 0) {
+        tmp /= 10;
+        ++digit;
+    }
+    for (i=1; i<=digit; i++) {
+        printf("%c", str[digit-i]);
+    }
+    printf("\n");
+    return 0;
+}