第一步

未命名2.c

@@ -0,0 +1,22 @@
+#include<stdio.h>
+
+int main()
+{char a,b,c,d,e;
+b='i';
+c='o';
+d='q';
+e='m';
+printf("%*s1.Input\n%*s2.Output\n%*s3.Order\n%*s4.Quit\n",30,"",30,"",30,"",30,"");
+scanf("%c",&a);
+if(a==b)
+printf("You are trying to Input info");
+if(a==c)
+printf("You are trying to Output info");
+if(a==d)
+printf("You are about to Quit");
+if(a==e)
+printf("You are trying to Make things ordered");
+if(a!=b && a!=c && a!=d && a!=e)
+printf("Wrong input"); 
+return 0;
+}