error checking

Author: ivanbrennan

prog.6.8A.c

@@ -0,0 +1,29 @@
+/* Program to evaluate simple expressions of the form
+               number  operator  number                 */
+
+#include <stdio.h>
+
+int main (void)
+{
+	float	value1, value2;
+	char	operator;
+
+	printf ("Type in your expression.\n");
+	scanf  ("%f %c %f", &value1, &operator, &value2);
+
+	if ( operator == '+' )
+		printf ("%.2f\n", value1 + value2);
+	else if ( operator == '-' )
+		printf ("%.2f\n", value1 - value2);
+	else if ( operator == '*' )
+		printf ("%.2f\n", value1 * value2);
+	else if ( operator == '/' )
+		if ( value2 == 0 )
+			printf ("Division by zero.\n");
+		else
+			printf ("%.2f\n", value1 / value2);
+	else
+		printf ("Unknown operator.\n");
+
+	return 0;
+}