把a文本内容复制到B文本

#include<stdio.h>
#include<iostream>
#pragma warning(disable : 4996)
int main()
{
FILE *fp1, *fp2;
fp1 = fopen("a.txt", "r");
fp2 = fopen("b.txt", "w");
while (!feof(fp1))
{
putchar(getc(fp1));
}

putchar(10);
rewind(fp1);
while (!feof(fp1))
{
putc(getc(fp1), fp2);

}
fclose(fp1);
fclose(fp2);
return 0;

}