1.纯C实现
FILE *fp; if ((fp = fopen("example.txt", "rb")) == NULL) { exit(0); } fseek(fp, 0, SEEK_END); int fileLen = ftell(fp); char *tmp = (char *) malloc(sizeof(char) * fileLen); fseek(fp, 0, SEEK_SET); fread(tmp, fileLen, sizeof(char), fp); fclose(fp); for(int i = 0; i < fileLen; ++i) { printf("%d ", tmp[i]); } printf("\n"); if ((fp = fopen("example.txt", "wb")) == NULL) { exit(0); } rewind(fp); fwrite(tmp, fileLen, sizeof(char), fp); fclose(fp); free(tmp);
CFile需要包含的头文件为Afx.h
打开文件的函数原型如下
if(!(fp.Open((LPCTSTR)m_strsendFilePathName,CFile::modeRead)))
有多种模式,常用的有如下:
modeRead
modeWrite
modeReadWrite
modeCreate
文件类型有两种:
typeBinary
typeText
读写非文本文件一定要用typeBinary
读取数据的函数原型:
virtual UINTRead(void*lpbuf, UINT nCount);
将文件读出:
CFile fp; if(!(fp.Open((LPCTSTR)m_strsendFilePathName,CFile::modeRead))) { return; } fp.SeekToEnd(); unsignedint fpLength = fp.GetLength(); char *tmp= new char[fpLength]; fp.SeekToBegin(); //这一句必不可少 if(fp.Read(tmp,fpLength) < 1) { fp.Close(); return; }
// 新建文件并写入
if(!(fp.Open((LPCTSTR)m_strsendFilePathName, CFile::modeCreate | CFile::modeWrite |CFile::typeBinary))) { return; } fp.SeekToBegin(); fp.write(tmp,fpLength); fp.close;
The End.