用文本替换占位符 - C? [英] Replace placeholders with text - C?

问题描述

我使用以下函数从 FILE 流中一个一个地检索字符.现在，该文件中的文本有时会包含诸如 !first_name! 之类的位置持有者！文中.检测此类占位符何时开始和何时结束的最佳方法是什么，以便我可以在 !!具有来自另一个存储的适当字符?

I use the below function to retrieve characters one by one from a FILE stream. Now the text in that file will sometimes include places holders like !first_name! within the text. What's the best way to detect when such a place holder start and when it ends so that I can swap each character between !! with proper character from another storage?

void print_chars(FILE *file) {
        fseek(file, 0L, 0);
        int cr;

        do {
              cr = fgetc(file);
              putchar(cr);
        } while (cr != EOF);
}

推荐答案

您也可以采用更原始的方法，一次读取 1 个字符，然后在 if char=='!' 时中断.然后建立一个字符串直到另一个 '!'然后将该字符串与您的替换列表进行比较..

you could also take a more primitive approach also by reading it in 1 character at a time and then breaking out if char=='!' and then build a string up til the other '!' and then just compare that string with your list of replacements..

@goe 的回复说推一个字符..这里是一些代码

@goe's reply To say push a char.. here is some code

//c is char read from file
if(c=='!'){
  char str[100];
  c=fgetc
  int i=0;
  while(c!='!'){
    str[i]=c;
    i++;
    c=fgetc
  }
  i++;
  str[i]='\0'; //null terminate
  if(strcmp(str,"....")... //continue... 
}

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