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#include<stdio.h>
#include<stdlib.h>
 
int main (void)
{
	int x, y, choice ;
 
	printf("請輸入1~4其中一個數字\n");
	scanf ("%d", &choice);
 
	do{
	switch(choice){
 
    	case 1:printf("你輸入的選項是 1 \n");
			   printf("請輸入兩個任意整數 \n");
 
			   scanf ("%d%d", &x, &y);
			   printf("這兩個數字相加的結果是 %d \n", x+y);
			   break;
 
 
		case 2:printf("你輸入的選項是 2 \n");
			   printf("請輸入兩個任意整數 \n");
 
			   scanf ("%d%d", &x, &y);
			   printf("這兩個數字相減的結果是 %d \n", x-y);
			   break;
 
		case 3:printf("你輸入的選項是 3 \n");
			   printf("請輸入兩個任意整數 \n");
 
			   scanf ("%d%d", &x, &y);
			   printf("這兩個數字相乘的結果是 %d \n", x*y);
			   break;
 
		case 4:printf("你輸入的選項是 4 \n");
			   printf("請輸入兩個任意整數 \n");
 
			   scanf ("%d%d", &x, &y);
			   printf("這兩個數字相除的結果是 %d \n", x/y);
			   break;
 
		default:
			printf("您輸入錯誤囉 \n");
		break;
		}
	}
 
	while ( );
 
system("pause");
return 0;
}
 
 

Main.java:1: error: illegal character: \35
#include<stdio.h>
^
Main.java:1: error: class, interface, or enum expected
#include<stdio.h>
        ^
Main.java:2: error: illegal character: \35
#include<stdlib.h>
^
Main.java:8: error: class, interface, or enum expected
	printf("???1~4??????\n");
	^
Main.java:9: error: class, interface, or enum expected
	scanf ("%d", &choice);
	^
Main.java:11: error: class, interface, or enum expected
	do{
	^
Main.java:15: error: class, interface, or enum expected
			   printf("????????? \n");
			   ^
Main.java:17: error: class, interface, or enum expected
			   scanf ("%d%d", &x, &y);
			   ^
Main.java:18: error: class, interface, or enum expected
			   printf("??????????? %d \n", x+y);
			   ^
Main.java:19: error: class, interface, or enum expected
			   break;
			   ^
Main.java:22: error: class, interface, or enum expected
		case 2:printf("??????? 2 \n");
		^
Main.java:23: error: class, interface, or enum expected
			   printf("????????? \n");
			   ^
Main.java:25: error: class, interface, or enum expected
			   scanf ("%d%d", &x, &y);
			   ^
Main.java:26: error: class, interface, or enum expected
			   printf("??????????? %d \n", x-y);
			   ^
Main.java:27: error: class, interface, or enum expected
			   break;
			   ^
Main.java:29: error: class, interface, or enum expected
		case 3:printf("??????? 3 \n");
		^
Main.java:30: error: class, interface, or enum expected
			   printf("????????? \n");
			   ^
Main.java:32: error: class, interface, or enum expected
			   scanf ("%d%d", &x, &y);
			   ^
Main.java:33: error: class, interface, or enum expected
			   printf("??????????? %d \n", x*y);
			   ^
Main.java:34: error: class, interface, or enum expected
			   break;
			   ^
Main.java:36: error: class, interface, or enum expected
		case 4:printf("??????? 4 \n");
		^
Main.java:37: error: class, interface, or enum expected
			   printf("????????? \n");
			   ^
Main.java:39: error: class, interface, or enum expected
			   scanf ("%d%d", &x, &y);
			   ^
Main.java:40: error: class, interface, or enum expected
			   printf("??????????? %d \n", x/y);
			   ^
Main.java:41: error: class, interface, or enum expected
			   break;
			   ^
Main.java:43: error: class, interface, or enum expected
		default:
		^
Main.java:45: error: class, interface, or enum expected
		break;
		^
Main.java:46: error: class, interface, or enum expected
		}
		^
Main.java:51: error: class, interface, or enum expected
system("pause");
^
Main.java:52: error: class, interface, or enum expected
return 0;
^
Main.java:53: error: class, interface, or enum expected
}
^
31 errors

Standard output is empty