7.5: v2 using more of sacnf

1 files changed, 13 insertions, 20 deletions

diff --git a/7.5/op.c b/7.5/op.c
index e7640e6..426baad 100644
--- a/7.5/op.c
+++ b/7.5/op.c
@@ -4,29 +4,22 @@
 
 char getop(char *op, size_t len)
 {
-	size_t i;
+	int rs;
+	double f;
 
-	*op = '\0'; // if scanf fails
-	do {
-		scanf("%c", op);
-	} while (isblank(*op));
+	while ((rs = scanf("%c", op)) != EOF)
+		if (*op != ' ' && *op != '\t')
+			break;
 
-	if (!isdigit(*op))
-		return *op;
-
-	i = 1;
-	do {
-		scanf("%c", op + i);
-	} while (isdigit(op[i]) && ++i < len);
+	op[1] = '\0';
+	if (rs == EOF)
+		return EOF;
 
-	if (op[i] == '.') {
-		i++;
-		do {
-			scanf("%c", op + i);
-		} while (isdigit(op[i]) && ++i < len);
-	}
+	if (!isdigit(*op) && *op != '.')
+		return *op;
 
-	ungetc(op[i], stdin);
-	op[i] = '\0';
+	ungetc(*op, stdin);
+	scanf("%lf", &f);
+	snprintf(op, len, "%lf", f);
 	return NUM;
 }