1.13

The C Programming Language/1.13.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+main()
+{
+	int c, i, nwhite, nother;
+	int ndigit[10];
+
+	nwhite = nother = 0;
+	for (i = 0; i < 10; ++i)
+		ndigit[i] = 0;
+
+	while ((c = getchar()) != EOF)
+		if (c >= '0' && c <= '9')
+			++ndigit[c-'0'];
+		else if (c == ' ' || c == '\t')
+			++nwhite;
+		else if (c == '\n')
+		{
+			++nwhite;
+			printf("digits = ");
+			for (i = 0; i < 10; ++i)
+				printf(" %d", ndigit[i]);
+			printf(", white space = %d, other = %d\n", nwhite, nother);
+		}
+		else
+			++nother;
+
+	printf("digits = ");
+	for (i = 0; i < 10; ++i)
+		printf(" %d", ndigit[i]);
+	printf(", white space = %d, other = %d\n", nwhite, nother);
+}