问题描述
建立两个java文件ReAlloc.javaTestReAlloc.java实现c中realloc()的功能提供另一个javaprogram：GenStrings.java用来为程序的输入用importjava.util.*;classGenStrings{staticfinalintMAX_STR_LEN=80;staticintnumStrs;staticintmaxSlen;Randomr=newRandom();voidprocess(){intsLen;for(inti=0;i<numStrs;i++){sLen=r.nextInt(maxSlen)+1;for(intj=0;j<sLen;j++){System.out.printf("%c",randChar());}System.out.println();}}charrandChar(){intiVal;charretVal;iVal=r.nextInt(maxSlen)%26+'a';retVal=(char)iVal;returnretVal;}publicstaticvoidmain(String[]args){if(args.length!=2){System.err.println("usage:javaGenStringsnumStrsmaxStrLen");System.exit(1);}numStrs=Integer.parseInt(args[0]);maxSlen=Integer.parseInt(args[1]);if(maxSlen>MAX_STR_LEN){System.err.println("ERROR:maximumstringlength="+MAX_STR_LEN);System.exit(1);}newGenStrings().process();}}最后显示结果如下：F:java>javaGenStringsusage:javaGenStringsnumStrsmaxStrLenF:java>javaGenStrings570hpkerarxvppssqjhmsbmsgodeicrvlefilalfsximljzwbkfazcavdvsufvpakesieapckiatxegrhunlumaktfhdcdtpgrbkeixdgixvwofttfaqqenjfmjharkcefhnkbkyjlszkptxhumrxyndozdiajayccruqhnuqaxehbaogihxbccsdkpageqknkiduiipmwuoilfjpiiswyjviqckpdwxquzomwdqpsjavacTestReAlloc.javajavaTestReAllocusage:TestReAllocchunkSizejavaTestReAlloc5hithereatestofstdin^DchunkSize:5totalbytesread:25totallinesread:5totalallocs:5javaGenStrings100080|javaTestReAlloc1chunkSize:1totalbytesread:42128totallinesread:1000totalallocs:42128javaGenStrings100080|javaTestReAlloc100chunkSize:100totalbytesread:41674totallinesread:1000totalallocs:417javaGenStrings100080|javaTestReAlloc1000chunkSize:1000totalbytesread:41421totallinesread:1000totalallocs:42javaGenStrings1000080|javaTestReAlloc1000chunkSize:1000totalbytesread:412568totallinesread:10000totalallocs:413javaGenStrings10000080|javaTestReAlloc1000chunkSize:1000totalbytesread:4151668totallinesread:100000totalallocs:4152tips：1.chunkSize为要分配的一块内存大小，假设是5时，当输入到第六个值需要再分配一个大小是5的内存，做法为生成出一个大小为10的内存，将6个值装入，下面再继续输入的值紧接着第六个值后面开始装入2.^D是用来结束输入3.EOL（EndOfLine）占用一个byte，windows下的EOL占用2个byte.所以上面输入的：问题补充：3.EOL（EndOfLine）占用一个byte，所以上面输入的：hithereatestofstdin一共是25个byte看错了，是下周二交老师不让用开发工具吗，要求手工代码，周二交作业，跪求答案
解决方案
解决方案二：
作业是不会有人帮你写的，这个需要自己多琢磨有某个地方不懂再来问，这样才会有人回答的。LZ加油吧
解决方案三：
该回复于2010-10-25 08:53:57被版主删除