feat:头文件和主菜单

.gitignore

@@ -0,0 +1,2 @@
+*.*~
+*.out

menuoutput.c

@@ -0,0 +1,19 @@
+#include "mysyslib.h"
+
+char mainMenu() {
+  char out[4][8] = {"Input","Output","Order","Quit"};
+  for(int i=1;i<5;i++){
+    for(int j=0;j<30;j++){
+      printf(" ");
+    }
+    printf("%d.%s\n",i,out[i-1]);
+  }
+  char ipt;
+  scanf("%c",&ipt);
+  return ipt;
+}
+
+int main(){
+  mainMenu();
+  return 0;
+}

mysyslib.h

@@ -0,0 +1,3 @@
+#include<stdio.h>
+
+char mainMenu();