贪心算法之加油问题

#include
int main()
{
    FILE *fp;//文件指针
    int a[100],b[100];
    int i,n,k,flag,sum,count,temp;
    fp=fopen("input.txt","r");
    if(fp==NULL)
    {
        printf("无法打开文件！\n");
        exit(0);
    }
    flag=0;
    i=0;
    temp=1;
    while(!feof(fp))
    {
        if(flag==0)
            fscanf(fp,"%d%d",&n,&k);//从文件中读取n,k
        flag=1;
        if(flag!=0)
            {
                fscanf(fp,"%d",&a[i++]);//从文件中读取加油站之间的距离
                if(a[i]>n)//如果两站距离大于n,则说明无法到达目的地
                   temp=0;
            }
    }
    fclose(fp);
    if(temp==0)
    {
        fp=fopen("output.txt","w");
        fprintf(fp,"No Solution");
        fclose(fp);
        return 0;
    }
    count=0;
    sum=0;
    for(i=0; in)
        {
            i--;
            b[count++]=i+1;
            sum=0;
        }
    }
    fp=fopen("output.txt","w");
    fprintf(fp,"%d",count);//把数据写到文件中去
    fclose(fp);
    return 0;
}