c 指针作为出参

int load(char * filaName , char *& buffer){

    

    FILE *file;



    if((file = fopen("D://a.txt","r")) == NULL)

    {

        printf("cant open file!");

    }

    fseek (file, 0, SEEK_END);   // non-portable

    char *c = "";

    int size=ftell (file);

    rewind (file);

    buffer = new char[size+1];

    *(buffer+size) = 0;

    int result = fread(buffer,sizeof(char),size,file);



    if(fclose(file)) printf("file close error!");

    return size;

}

调用

int _tmain(int argc, _TCHAR* argv[])

{

    char *str;

    int size = load("",str);

    printf("%s",str);

    scanf("sad");

    return 0;

}