[JSP ] readline時會停住的問題…

看板java作者ryannork (下雨天)時間13年前 (2011/07/17 15:45)推噓0(0推 0噓 7→)

留言7則, 2人參與討論串1/2 (看更多)

<% if(solStateNum == 0){ String WA_check[] = {"cmd","/c","D:\\"+solNumber[1]+".exe"}; try{ Process pro = runtime.exec(WA_check); BufferedWriter WA_In = new BufferedWriter( new OutputStreamWriter(pro.getOutputStream())); BufferedReader WA_Out = new BufferedReader( new InputStreamReader(pro.getInputStream())); FileWriter errorWriter = new FileWriter( "D:\\"+solNumber[1]+".txt",true); %> <sql:query var="test"> Select * From test_point Where qNum = ? <sql:param value="${param.qNum}"/> </sql:query> <c:forEach var="test" items="${test.rows}"> <c:set var="input" scope="request" value="${test.testInput}"/> <c:set var="output" scope="request" value="${test.testOutput}"/> <% String input = (String)request.getAttribute("input"); String output = (String)request.getAttribute("output"); WA_In.write(input); WA_In.flush(); if((line = WA_Out.readLine()) != null){ if(!line.equals(output)){ //輸出資料比對 errorWriter.write("Your answer is : "+line); errorWriter.write("The correct answer is : " +output); solStateNum = 3; } } %> </c:forEach> <% errorWriter.close(); WA_In.close(); WA_Out.close(); pro.destroy(); } catch (Exception e) { e.printStackTrace(); runtime.exit(0); } } %> 這是我的部份程式目的是要做由gcc編譯完後得到的exe檔，開啟並輸入值，然後再比對輸出是否和正確答案一樣編譯的c程式如下 #include<stdio.h> int main() { char s[9999]; while( scanf("%s",s)!=EOF ) { printf("hello, %s\n",s); } return 0; } 我是用if(true)return;的方式得知在readline時停住了(就是網頁跑很久都沒有結果) 卻一直不明白為何… -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.125.57.131

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calais007

07/19 15:19, , 1^F

07/19 15:19, 1^F

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calais007

07/19 15:21, , 2^F

07/19 15:21, 2^F

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ryannork

07/20 10:48, , 3^F

07/20 10:48, 3^F