C语言 在最后一个单词的末尾添加额外的空格

eyh26e7m  于 2024-01-06  发布在  其他
关注(0)|答案(1)|浏览(262)

这是我的代码。它应该写下每一个第二个单词，从START到STOP，从一个文件到另一个文件。代码工作正常，但在最后一个单词的末尾有一个额外的空格。有什么建议吗？我尝试了一些东西，但最终只在前面有额外的空格，没有空格，或者多个不需要的空格。

  1. #include <stdio.h>
  3. #define MAX_BUFFER_SIZE 100
  5. typedef struct {
  6.     FILE *inputFile;
  7.     FILE *outputFile;
  8. } FilePair;
  10. void initializeFiles(FilePair *files, char *inputFileName, char *outputFileName);
  11. void closeFiles(FilePair *files);
  12. void processFile(FilePair *files);
  14. int main(int argc, char *argv[]) {
  15.     FilePair files;
  17.     initializeFiles(&files, argv[1], argv[2]);
  19.     if (files.inputFile == NULL || files.outputFile == NULL) {
  20.         return 1;
  21.     }
  23.     processFile(&files);
  25.     closeFiles(&files);
  27.     return 0;
  28. }
  30. void initializeFiles(FilePair *files, char *inputFileName, char *outputFileName) {
  31.     files->inputFile = fopen(inputFileName, "r");
  32.     files->outputFile = fopen(outputFileName, "w");
  34.     if (files->inputFile == NULL || files->outputFile == NULL) {
  35.         char error[] = "Error opening files\n";
  36.         for (int i = 0; error[i] != '\0'; i++) {
  37.             fputc(error[i], files->outputFile);
  38.         }
  39.         fclose(files->outputFile);
  40.         files->outputFile = NULL; 
  41.         fclose(files->inputFile);
  42.         files->inputFile = NULL; 
  43.         return;
  44.     }
  45. }
  47. void closeFiles(FilePair *files) {
  48.     if (files->inputFile != NULL) {
  49.         fclose(files->inputFile);
  50.         files->inputFile = NULL;
  51.     }
  52.     if (files->outputFile != NULL) {
  53.         fclose(files->outputFile);
  54.         files->outputFile = NULL;
  55.     }
  56. }
  58. void processFile(FilePair *files) {
  59.     char startMarker[7] = "START ";
  60.     char stopMarker[5] = "STOP";
  61.     char buffer[MAX_BUFFER_SIZE];
  62.     int startIdx = 0, stopIdx = 0;
  63.     int isStart = 0;
  64.     int spaceCount = 0;
  66.     while (1) {
  67.         int character = fgetc(files->inputFile);
  68.         if (character == EOF) {
  69.             break;
  70.         }
  72.         for (int i = 0; i < MAX_BUFFER_SIZE; i++) {
  73.             buffer[i] = '\0';
  74.         }
  76.         buffer[0] = character;
  77.         for (int i = 1; i < MAX_BUFFER_SIZE - 1; i++) {
  78.             character = fgetc(files->inputFile);
  79.             if (character == EOF || character == '\n') {
  80.                 break;
  81.             }
  82.             buffer[i] = character;
  83.         }
  85.         for (int i = 0; buffer[i] != '\0'; i++) {
  86.             char ch = buffer[i];
  88.             if (isStart) {
  89.                 if (spaceCount % 2 != 0) {
  90.                     fputc(ch, files->outputFile);
  91.                 }
  92.                 if (ch == ' ') {
  93.                     spaceCount++;
  94.                 }
  96.                 if (ch == stopMarker[stopIdx]) {
  97.                     stopIdx++;
  98.                 } else {
  99.                     stopIdx = 0;
  100.                 }
  101.                 if (stopMarker[stopIdx] == '\0') {
  102.                     isStart = 0;
  103.                 }
  104.             } else {
  105.                 if (ch == startMarker[startIdx]) {
  106.                     startIdx++;
  107.                 } else {
  108.                     startIdx = 0;
  109.                 }
  110.                 if (startMarker[startIdx] == '\0') {
  111.                     isStart = 1;
  112.                 }
  113.             }
  114.         }
  115.     }
  116. }

字符串
我只是想去掉最后一个词末尾的空格

c

1条答案

按热度按时间
tp5buhyn

tp5buhyn1#

你可以稍微修改一下你的逻辑，去掉最后一个单词末尾的多余空格。一种方法是维护一个标志来检查当前单词是否是最后一个单词。

修改代码如下：

  1. #include <stdio.h>
  3. #define MAX_BUFFER_SIZE 100
  5. typedef struct {
  6.     FILE *inputFile;
  7.     FILE *outputFile;
  8. } FilePair;
  10. void initializeFiles(FilePair *files, char *inputFileName, char *outputFileName);
  11. void closeFiles(FilePair *files);
  12. void processFile(FilePair *files);
  14. int main(int argc, char *argv[]) {
  15.     FilePair files;
  17.     initializeFiles(&files, argv[1], argv[2]);
  19.     if (files.inputFile == NULL || files.outputFile == NULL) {
  20.         return 1;
  21.     }
  23.     processFile(&files);
  25.     closeFiles(&files);
  27.     return 0;
  28. }
  30. void initializeFiles(FilePair *files, char *inputFileName, char *outputFileName) {
  31.     files->inputFile = fopen(inputFileName, "r");
  32.     files->outputFile = fopen(outputFileName, "w");
  34.     if (files->inputFile == NULL || files->outputFile == NULL) {
  35.         char error[] = "Error opening files\n";
  36.         for (int i = 0; error[i] != '\0'; i++) {
  37.             fputc(error[i], files->outputFile);
  38.         }
  39.         fclose(files->outputFile);
  40.         files->outputFile = NULL;
  41.         fclose(files->inputFile);
  42.         files->inputFile = NULL;
  43.         return;
  44.     }
  45. }
  47. void closeFiles(FilePair *files) {
  48.     if (files->inputFile != NULL) {
  49.         fclose(files->inputFile);
  50.         files->inputFile = NULL;
  51.     }
  52.     if (files->outputFile != NULL) {
  53.         fclose(files->outputFile);
  54.         files->outputFile = NULL;
  55.     }
  56. }
  58. void processFile(FilePair *files) {
  59.     char startMarker[7] = "START ";
  60.     char stopMarker[5] = "STOP";
  61.     char buffer[MAX_BUFFER_SIZE];
  62.     int startIdx = 0, stopIdx = 0;
  63.     int isStart = 0;
  64.     int spaceCount = 0;
  65.     int lastWord = 0;
  67.     while (1) {
  68.         int character = fgetc(files->inputFile);
  69.         if (character == EOF) {
  70.             break;
  71.         }
  73.         for (int i = 0; i < MAX_BUFFER_SIZE; i++) {
  74.             buffer[i] = '\0';
  75.         }
  77.         buffer[0] = character;
  78.         for (int i = 1; i < MAX_BUFFER_SIZE - 1; i++) {
  79.             character = fgetc(files->inputFile);
  80.             if (character == EOF || character == '\n') {
  81.                 lastWord = 1;  // Mark that this is the last word
  82.                 break;
  83.             }
  84.             buffer[i] = character;
  85.         }
  87.         for (int i = 0; buffer[i] != '\0'; i++) {
  88.             char ch = buffer[i];
  90.             if (isStart) {
  91.                 if (spaceCount % 2 != 0) {
  92.                     fputc(ch, files->outputFile);
  93.                 }
  94.                 if (ch == ' ') {
  95.                     spaceCount++;
  96.                 }
  98.                 if (ch == stopMarker[stopIdx]) {
  99.                     stopIdx++;
  100.                 } else {
  101.                     stopIdx = 0;
  102.                 }
  103.                 if (stopMarker[stopIdx] == '\0') {
  104.                     isStart = 0;
  105.                 }
  106.             } else {
  107.                 if (ch == startMarker[startIdx]) {
  108.                     startIdx++;
  109.                 } else {
  110.                     startIdx = 0;
  111.                 }
  112.                 if (startMarker[startIdx] == '\0') {
  113.                     isStart = 1;
  114.                 }
  115.             }
  116.         }
  118.         if (lastWord) {
  119.             // Check if this is the last word and avoid adding an extra space
  120.             fputc('\n', files->outputFile);
  121.             break;
  122.         }
  123.     }
  124. }

字符串
引入lastWord变量是为了跟踪当前单词是否是最后一个单词。如果它是最后一个单词，它可以避免在末尾添加额外的空格。此外，它会在输出文件中添加一个换行符以保持干净的输出。我希望这有助于解决您的错误。如需更多帮助，请在下面评论。

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