我编写这个函数是为了从文件中读取一行: const char *readLine(FILE *file) { if (file == NULL) { printf("Error: file pointer is null."); exit(1); } int maximumLineLength = 128; char *lineBuffer = (char *)malloc(sizeof(char) * maximumLineLength); if (lineBuffer == NULL) { printf...
FILE * fp; char * line = NULL; size_t len = 0; ssize_t read; fp = fopen("/etc/motd", "r"); if (fp == NULL) exit(EXIT_FAILURE); while ((read = getline(&line, &len, fp)) != 1) { printf("Retrieved line of length %zu :\n", read); printf("%s", line); } if (...
以附加方式打开可读写的文件。若文件不存在，则会建立该文件，如果文件存在，写入的数据会被加到文件尾后，即文件原先的内容会被保留。C语言中文本文件的逐行读取的实现的代码如下：include<stdio.h> main(){ FILE * fp;fp=fopen(“noexist”,”a+”);if(fp= =NULL) return;fclose(fp);} ...
如果到达文件结尾或读取失败,它会返回EOF(End of File)。 示例:演示如何使用fgets函数逐行读取文本文件和使用getc函数逐字符读取文本文件: #include <stdio.h> int main() { FILE* fp; char line[100]; int ch; // 逐行读取文本文件 fp = fopen("file.txt", "r"); if (fp == NULL) { printf("...
[MAX_LINE];/*缓冲区*/FILE*fp;/*文件指针*/int len;/*行字符个数*/if((fp=fopen("D:/CppWorkspace/Class_2/Class4/abc.txt","r"))==NULL){perror("fail to read");exit(1);}while(fgets(buf,MAX_LINE,fp)!=NULL){len=strlen(buf);buf[len-1]='\0';/*去掉换行符*/printf("%s %d ...
百度试题 题目从文件中读取一行内容的函数是() A.read()B.readline()C.readlines()D.openline()相关知识点: 试题来源: 解析 B 反馈 收藏
23file <<"fstream line 7 test"<<endl;24file <<"fstream line 8 test"<<endl;25file.close();2627/*read file operation*/28file.open("temp.txt", ios::in);29while(!file.eof()){30charbuf[200];31file.getline(buf,200);32cout << buf <<endl;33}34file.close();3536system("pause")...
created since this mo createeventobject createfilemapping creates a plane creates the malnutrit creates the problem creates the world bra createvt createprocessdebugeve createexplicitkeyscal creatine kinase isoen creatine production creatinemia creating a world with creating collages creating custom error ...
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voidreaddatafromfileLBL(){ifstreamfin("data.txt");constintLINE_LENGTH=100;char str[LINE_LENGTH];while(fin.getline(str,LINE_LENGTH)){cout<<"Read from file: "<<str<<endl;//要输出4次}} 程序结果: 3.读取方式:逐行读取, 将行读入字符串, 行之间用回车换行区分 ...