题目内容
函数ReadDat()实现从文件in．dat中读取一篇英文文章并将其存入到字符串数组xx中。请编制函数StrOL()，其函数的功能是：以行为单位对行中以空格或标点符号为分隔的所有单词进行倒排。最后把已处理的字符串(应不含标点符号)仍按行重新存入字符串数组XX中，最后调用函数WriteDat()把结果xx输出到文件out.dat中。例如：原文：You He MeI am s student．结果：Me He Youstudent a am I原是数据文件存放的格式是：每行的宽度均小于80个字符，含标点符号和空格。注意：部分源程序给出如下：请勿改动主函数main()、读数据函数ReadDat()和输出数据函数WriteDat()的内容。[试题源程序]#include＜stdio h＞#include＜string．h＞#include＜conio．h＞#include＜ctype h＞char xx[50][80]；int maxline=0；/*文章的总行数*/int ReadDat(void)；void WriteDat(void)；void StrOL(void){}void main(){system("cls")；if(ReadDat()){printf("数据文件IN．DAT不能打开!\n\007")；return；}StrOL()；WriteDat()；}int ReadDat(void){FILE*fp；int i=0；char*P；if((fp=fopen("IN DAT"，"r")==NULL)return 1；while(fgets(xx[i]，80，fp)!=NULL){P=strchr(xx[i]，’\n’)；if(p)*P=0；i++：}maxline=i；fclose(fp)；return 0；}void WriteDat(void){FILE*fp；int i；system("cls")；fp=fopen("OUT．DAT"，"w");for(i=0；i＜maxline；i++){printf("%s\n"，xx[i])；fprintf(fp，"%s\n"，xx[i])；}fclose(fp)；}
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