- scanf test. Verifies the operation of scanning floats

lib/libc/tests/stdio/scanftst.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main (int argc, char **argv) {
+	register int i, j;
+	double d;
+	char *p;
+
+	while(1) {
+		printf("enter an integer:\n");
+		i = scanf("%d", &j);
+		if (i<0) exit (1);
+		if (i > 0) {
+			printf("scanf returned %d.  j == %d\n", i, j);
+		} else {
+			printf("invalid input: enter an integer\n");
+			continue;
+		}
+		d = 5.5;
+		printf("enter a float.  5.5 = %g\t", d);
+		p = (char *) &d;
+		for (j = 0; j < sizeof(double); j++) {
+			printf("%x ", *p++);
+		}
+		printf("\n");
+		i = scanf("%lf", &d);
+		if (i<0) exit (1);
+		if (i > 0) {
+			printf("i = %d, d = %g\n", i, d);
+			p = (char *) &d;
+			for (j = 0; j < sizeof(double); j++) {
+				printf("%x ", *p++);
+			}
+			printf("\n");
+		} else {
+			printf("invalid input: enter a double\n");
+		}
+	}
+	return 0;
+}