给出以下程序的执行结果。
#include <stdio.h>
void main()
{
FELE * fp;
int i=20,j=30,k,n;
fp=fopen("data.dat","w");
fprintf(fp,"%d\n",i);
fprintf(fp,"%d\n",j);
fclose(fp);
fp=fopen("data.dat","r");
fscanf(fp,"%d%d",&k,&n);
printf("%d,%d\n",k,n);
fclose(fp);
} 
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