commit - 475eb200286589fa9b991140abaa9b1c917341c1
commit + ce680abd0aecc35c3967e6b940d84c652876e88e
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blob + a22dafbf6d5116dbe43af03557fe4dc05d55377c (mode 644)
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+++ 1-14-text
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+THE WAY TO WEALTH
+
+(From "Father Abraham's Speech," forming
+the preface to Poor _Richard's Almanac_ for 1758.)
blob - /dev/null
blob + 8885413a9614c05ef2b21143555cbbd24bbde24f (mode 644)
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+++ 1-14.c
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+/* 1-14 Write a program to print a histogram of the frequencies of different
+ * characters in its input. */
+
+#include <stdio.h>
+
+#define MINCHAR 32	/* only printable ASCII characters */
+#define MAXCHAR 127
+
+int main() {
+	int c;					/* current character */
+	int chars[MAXCHAR+1];	/* frequencies of ASCII chars */
+	int last = 0;			/* index of last ASCII char */
+	int mode = 0;			/* char which occurs most frequently */
+	for (int i = MINCHAR; i <= MAXCHAR; i++) {
+		chars[i] = 0;
+	}
+	while ((c = getchar()) != EOF) {
+		chars[c]++;
+	}
+
+	/* Determine last index and mode */
+	for (int i = MINCHAR; i <= MAXCHAR; i++) {
+		if (chars[i] > 0) {
+			last = i;
+		}
+		if (chars[i] > mode) {
+			mode = chars[i];
+		}
+	}
+	
+	/* Horizontal orientation */
+	for (int i = MINCHAR; i <= last; i++) {
+		if (chars[i] > 0) {
+			printf("%c: ", i);
+			for (int j = 0; j < chars[i]; j++) {
+				printf("=");
+			}
+			printf("\n");
+		}
+	}
+
+	/* Vertical orientation */
+	for (int j = mode; j > 0; j--) {
+		for (int i = MINCHAR; i <= last; i++) {
+			if (chars[i] > 0) {
+				if (chars[i] >= j) {
+					printf("|");
+				} else {
+					printf(" ");
+				}
+			}
+		}
+		printf("\n");
+	}
+	for (int i = MINCHAR; i <= last; i++) {
+		if (chars[i] > 0) {
+			printf("%c", i);
+		}
+	}
+	printf("\n");
+}