6.1.1: 6.1 but with pointers instead of array indices

1 files changed, 69 insertions, 0 deletions

diff --git a/6.1.1/main.c b/6.1.1/main.c
new file mode 100644
index 0000000..3d35bb0
--- /dev/null
+++ b/6.1.1/main.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <ctype.h>
+#include "word.h"
+#include "key.h"
+
+#define MAXWORD 100
+
+struct key keytab[] = {
+	"#define", 0,
+	"#elif", 0,
+	"#else", 0,
+	"#endif", 0,
+	"#error", 0,
+	"#if", 0,
+	"#ifdef", 0,
+	"#ifndef", 0,
+	"#include", 0,
+	"#pragma", 0,
+	"#undef", 0,
+	"auto", 0,
+	"break", 0,
+	"case", 0,
+	"char", 0,
+	"const", 0,
+	"continue", 0,
+	"default", 0,
+	"do", 0,
+	"double", 0,
+	"else", 0,
+	"enum", 0,
+	"extern", 0,
+	"float", 0,
+	"for", 0,
+	"goto", 0,
+	"if", 0,
+	"int", 0,
+	"long", 0,
+	"register", 0,
+	"return", 0,
+	"short", 0,
+	"signed", 0,
+	"sizeof", 0,
+	"static", 0,
+	"struct", 0,
+	"switch", 0,
+	"typedef", 0,
+	"union", 0,
+	"unsigned", 0,
+	"void", 0,
+	"volatile", 0,
+	"while", 0,
+};
+
+int main(void)
+{
+	char word[MAXWORD];
+	struct key *p;
+
+	while (getword(word, MAXWORD) != EOF)
+		if (isalpha(word[0]) || word[0] == '#')
+			if ((p = bsearch(word, keytab, NKEYS)) != NULL)
+				p->count++;
+
+	for (p = keytab; p < keytab + NKEYS; ++p)
+		if(p->count > 0)
+			printf("%4d %s\n", p->count, p->word);
+
+	return 0;
+}