Question

为什么ACM会报错，明明在VC上运行没问题，各位大神求救求教。

试编写一个程序完成：有两个磁盘文件“A”和“B”，各存放一行字母，今要求把这两个文件中的信息合并(按字母顺序排列)，输出到一个新文件“C”中去。
#include <stdio.h>
#include <string.h>
main()
{
FILE *fpa,*fpb,*fpc;
char a[30],b[30],c[30],d[30],e[60],f[60];
int i,j,n;
gets(a);
gets(b);
if((fpa=fopen("C:\\A.txt","w")) != NULL)
fputs(a,fpa);
if((fpb=fopen("C:\\B.txt","w")) != NULL)
fputs(b,fpb);
fclose(fpa);
fclose(fpb);
if((fpa=fopen("C:\\A.txt","r")) != NULL)
{
fgets(c,30,fpa);
printf("the content of file A:%s\n",c);
}
if((fpb=fopen("C:\\B.txt","r")) != NULL)
{
fgets(d,30,fpb);
printf("the content of file B:%s\n",d);
}
strcpy(e,c);
strcat(e,d);
n=strlen(e);
for(i=0;i<n-1;i++)
{
for(j=i+1;j<n;j++)
{
char t;
if(e[i]>e[j])
{
t=e[i];
e[i]=e[j];
e[j]=t;
}
}
}
if((fpc=fopen("C:\\C.txt","w")) != NULL)
fputs(e,fpc);
fclose(fpc);
if((fpc=fopen("C:\\C.txt","r")) != NULL)
{
fgets(f,60,fpc);
printf("the content of file C:%s\n",f);
}
fclose(fpc);
}

Answer 1

让我们来看看北大POJ的官方解释：
Runtime Error （RE）：The solution has caused an unhandled exception (as defined by the runtime environment) during execution.

Time Limit Exceeded（TLE）：The solution has run for longer time than permitted. This means either the time spent on all test cases exceeds the overall limit or that spent on a single test case exceeds the per-case limit. Note that time limits for solutions in Java are tripled. These solutions are also allowed an extra 110 ms for each test case.

一般在本地没问题，上传即RE的，多是运行时数组申请不够大，一些大的测试数据使得超过了申请的空间所致。RE属于编译通过，运行时实时错误。而CE（Compile Error）属处怠边干装妨膘施博渐于编译错误。
参考资料：acm.pku.edu.cn/JudgeOnline/page?id=1000

追问

但我直接是wrong answer...