Exercise 1-13. Vertical histogram

12-histogram.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+
+#define IN       1
+#define OUT      0
+#define MAXERROR "WARNING: Word length '%d' exceeded 99\n"
+
+int main()
+{
+	int c, i, j, state, count, top;
+	int wordl[100];
+
+	count = state = top = OUT;
+	for(i = 0; i < 100; ++i)
+		wordl[i] = 0;
+
+	while ((c = getchar()) != EOF) {
+		if (c == ' ' || c == '\n' || c == '\t') {
+			state = OUT;
+			if (count > 0 && count < 100)
+				++wordl[count];
+			else if (count >= 100)
+				printf(MAXERROR, count);
+			count = 0;
+		} else {
+			++count;
+			if (state == OUT)
+				state = IN;
+		}
+	}
+
+	if (count > 0 && count < 100)
+		++wordl[count];
+	else if (count >= 100)
+		printf(MAXERROR, count);
+
+	for (i = 0; i < 100; ++i)
+		if (wordl[i] > top)
+			top = wordl[i];
+
+	printf("\n");
+	for (i = 0; i < 100; ++i)
+		if (wordl[i] > 0)
+			printf("%2d ", i);
+
+	printf("\n");
+	for (i = 1; i <= top; ++i) {
+		for (j = 0; j < 100; ++j) {
+			if (wordl[j] >= i)
+				printf(" # ");
+			else if (wordl[j] > 0)
+				printf("   ");
+		}
+		printf("\n");
+	}
+}