1 files changed, 44 insertions, 0 deletions
diff --git a/7.5/main.c b/7.5/main.c
new file mode 100644
index 0000000..cf5194e
--- /dev/null
+++ b/7.5/main.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "stk.h"
+#include "op.h"
+
+#define MAXOP	100
+
+int main(void)
+{
+	char op[MAXOP];
+	int opd2;
+	int c;
+
+	while ((c = getop(op, MAXOP))) {
+		switch (c) {
+		case NUM:
+			push(atof(op));
+			break;
+		case '+':
+			push(pop() + pop());
+			break;
+		case '-':
+			opd2 = pop();
+			push(pop() + opd2);
+			break;
+		case '*':
+			push(pop() * pop());
+			break;
+		case '/':
+			opd2 = pop();
+			push(pop() / opd2);
+			break;
+		case '\n':
+			printf("\tans: %.2lf\n", pop());
+			clear();
+			break;
+		default:
+			printf("err: unkown operator: %c\n", c);
+			break;
+		}
+	}
+
+	return 0;
+}