vertical histogram

1 files changed, 28 insertions, 6 deletions

diff --git a/1.6.c b/1.6.c
index ae88521..1d4beef 100644
--- a/1.6.c
+++ b/1.6.c
@@ -3,8 +3,17 @@
 #define INWORD  1
 #define MAXWORDLEN 20
 
+int longest(const int *list) {
+    int max = 0;
+    int length = sizeof list / sizeof *list;
+    for (int i = 0; i < length; i++){
+        if (list[i] > max) max = list[i];
+    }
+    return max;
+}
+
 int main () {
-	int c, i, wordlen;
+	int c, i, j, wordlen;
 	int ndigit[MAXWORDLEN] = {0};
     wordlen = 0;
     char state = OUTWORD;
@@ -20,10 +29,23 @@ int main () {
             ++wordlen;
         }
     }
-	for (i = 0; i < MAXWORDLEN; ++i) {
-		printf("%2d | ", i);
-        for (int j = 0; j < ndigit[i]; ++j)
-            printf("=");
-        printf("%d\n", ndigit[i]);
+    int max = longest(&ndigit);
+    // i counts down from the top to the bottom
+    // (actually from a couple above the top, for padding)
+    // we start printing each bar as i gets to be within the bar's value
+	for (i = max + 2; i > 0; i--) {
+        // side axis
+		printf("%2d |", i);
+        for (int j = 0; j < MAXWORDLEN; ++j)
+            printf(" %s ", i <= ndigit[j] ? "=" : " ");
+        printf("\n");
     }
+    // bottom axis
+    printf("   +");
+    for (j = 0; j < MAXWORDLEN; ++j)
+        printf("-|-");
+    printf("\n   |");
+    for (j = 0; j < MAXWORDLEN; ++j)
+        printf("%3d", j);
+    printf("\n");
 }