C语言error LNK1120 LNK2019
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <io.h>

//选择法排序
int main(){
int flag,n,i=0,j,k,t,b;
int temp[1024];
FILE *in,*out;
char inFileName[90],outFileName[90];

printf("please input the input file name：\n");
scanf("%s",&inFileName);
printf("please input the output file name：\n");
scanf("%s",&outFileName);

if((in=fopen(inFileName,"rt"))==NULL)
{
printf("无法打开输入文件\n");
return 1;
}
else {
//读入输入文件
while (!EOF);{
fscanf(in,"%d",&temp[i++]);
}
n=i;
fclose(in);
}

if((out=fopen(outFileName,"w+"))==NULL)
{
printf("无法打开输出文件\n");
return 1;
}
else{
//选择排序，从小到大排列数据
for(j=0;j<n-1;j++){
t=j;
for(k=j+1;k<n;k++)
if(temp[t]>temp[j])
t=j;
if(j!=t){
b = temp[t];
temp[t] = temp[j];
temp[j] = b;
}
}

printf("please input '0' or '1'to choose the way of sorting\n");
printf("'0'for from small to big\n");
printf("'1'for from big to small\n");
scanf("%d",&flag);
switch (flag){
case 0:
i=0;
while(i<n)fprintf(out,"%d",temp[i++]);
break;


case 1:
while(i+1)fprintf(out,"%d",temp[--i]);
break;


default: {
printf("input ERROR");
exit(1);
}
}
fclose(out);
}
return 0;
}

[解决办法]
用VS2008编译了一下,没有发现错误.