摘要

C实现将txt数据读入内存/CPU缓存的函数，不多说，实现如下。

1. 实现代码

#include "stdafx.h" #include <stdio.h> #include <stdlib.h> int filelength(FILE *fp); char *readfile(char *path); int main(void){ char *string; string=readfile("C:/Users/Joe WANG/Desktop/Data.txt"); printf("数据读入内存完毕！ \n"); printf("内存中的数据如下:\n%s \n",string); system("pause"); return 0; } char *readfile(char *path){ FILE *fp; int length; char *ch; if((fp=fopen(path,"r"))==NULL){ printf("open file %s error.\n",path); exit(0); } length=filelength(fp); ch=(char *)malloc(length); fread(ch,length,1,fp); *(ch+length)='\0'; return ch; } int filelength(FILE *fp){ int num; fseek(fp,0,SEEK_END); num=ftell(fp); fseek(fp,0,SEEK_SET); return num; }

2. Data.txt中的源数据

3. 测试结果