fprintf的错误 error C2664

请问高手们```为什么运行下面程序时出现cpp(44) : error C2664: 'fprintf' : cannot convert parameter 1 from 'char [13]' to 'struct _iobuf *'??问题就是在那个fprintf()里面```到地是什么错误呢`要怎么修改才能正常运行呢???

# include <iostream.h>
# include <stdio.h>
# include <stdlib.h>
# include <conio.h>
# define L 21

struct inf
{
char Z [L];
char A1 [L];
char A2 [L];
char B [L];
} * P;

void main()
{
int i;
struct inf str;
P= &str;
char KEY [L]="123456789";
P=(struct inf*) malloc (sizeof(struct inf));
FILE * fp1,*fp2;
fp1=fopen ( "G:\\123\\123.txt","r" );
if (fp1==NULL)
{
cout<<"打开失败!";
getch ();
exit (1);
}
fscanf (fp1,"%s%s%s%s%",P->Z,P->A1,P->A2,P->B);
fclose (fp1);
for ( i=0; i<L; i++ ) P->Z [i]^=KEY [i]; //位或加