c 读取整个文件内容

char* textFileRead(char* filename)
{
char* text;
FILE *pf = fopen(filename,"r");
fseek(pf,0,SEEK_END);
long lSize = ftell(pf);
// 用完后需要将内存free掉
text=(char*)malloc(lSize+1);
rewind(pf); 
fread(text,sizeof(char),lSize,pf);
text[lSize] = '\0';
return text;
}