除了json,xml,protobuf等成体系的配置文件外，简单的文本格式“key value”的配置文件也在很多开源项目中存在，这种配置文件的好处是简单、易于理解和编辑。

#include <stdio.h>
#include <string.h>#define MAX_LINE_LENGTH 1024void ParseConfig(const char *filePath)
{FILE *file = fopen(filePath, "r");if (file == NULL){perror("Error opening file");return;}char line[MAX_LINE_LENGTH];while (fgets(line, sizeof(line), file) != NULL){// 去掉行末尾的换行符line[strcspn(line, "\r\n")] = '\0';// 忽略注释和空行if (line[0] == '#' || line[0] == '\0'){continue;}// 解析配置项char *key = strtok(line, " \t");char *value = strtok(NULL, " \t");if (key != NULL && value != NULL){printf("%s   %s\n", key, value);}}fclose(file);
}int main()
{const char *filePath = "config.txt";ParseConfig(filePath);return 0;
}