delete

main.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <cp.h>
+#include <minus.h>
+#include <pzd.h>
+#include <yx.h>
+int main(){
+    int a,op1,op2;
+    while(1){
+        printf("----------------- Menu -------------------\n");
+        printf("1.plus    2.minus    3.multiple   4.divide");
+        printf("------------------------------------------\n");
+        printf("Please choose your operator:");
+        scanf("%d",&a);
+        if(a==0) break;
+        printf("Please input op1:");
+        scanf("%d",&op1);
+        printf("Please input op2:");
+        scanf("%d",&op2);
+        switch(a){
+            case 1:
+                add(op1,op2);//
+                break;
+            case 2:
+                minus(op1,op2);//
+                break;
+            case 3:
+                multi(op1,op2);//
+                break;
+            case 4:
+                division(op1,op2);//
+                break;      
+            default:
+                printf("Please input correct number.\n");      
+        }
+    }
+    printf("Have a good time.");
+    
+    return 1 ;
+}

minus.h

@@ -0,0 +1,8 @@
+include<stdio.h>
+float minus(float a,float b);
+float minus(float a,float b)
+{
+	a = a - b;
+	printf("%d - %d",a,b);
+	return a;
+}

pzd.h

@@ -0,0 +1,11 @@
+#include <stdio.h>
+#ifndef GRAPHICS_H
+
+#define GRAPHICS_H
+
+float multi(float a,float b)
+{ float c;
+c=a*b;
+printf("c=%f”,c);
+return c;
+}

yx.h

@@ -0,0 +1,7 @@
+#include<stdio.h>
+
+float add(float x,float y){
+    float sum = x + y;
+    printf("%f + %f = %f",x,y,sum);
+    return sum;
+}