有以下程序 #include main( ) { FILE *fp;int i=2
题型:单项选择题
问题:
有以下程序
#include
main( )
{ FILE *fp;int i=20,j=30,k,n;
fp=fopen("d1.dat","w");
fprintf(fp,"%d\n",i);fprintf(fp,"%d\n",j);
fclose(fp);
fp=fopen("d1.dat","r");
fscanf(fp,"%d%d",&k,&n);printf("%d%d\n",k,n);
fclose(fp);}
程序运行后的输出结果是
A)20 30 B)20 50 C)30 50 D)30 20