#include<stdio.h>
#define N 6
typedef struct yonghu
{
    long huhao;
    int shuihao;
    int dianhao;
}yonghu[N];      
void main()
{
FILE*fp;
int i;
long shuihao,dianhao;   
float shuihaop,dianhaop,sdp;      
float shuip[6],dianp[6],shui,dian,sum[6];        


fp=fopen("input.dat","wb");           
printf("输入水和电的价格\n");
scanf("%f %f",&shui,&dian);
getchar();
fprintf(fp,"%.lf",shui);
fprintf(fp,"%.lf",dian);
printf("输入用户的信息\n");
for(i=0;i<6;i++)
{
    scanf("%ld %d %d",&yonghu[i].huhao,&yonghu[i].shuihao,&yonghu[i].dianhao);
    getchar();
    fprintf(fp,"%d%d%d\n",yonghu[i].huhao,yonghu[i].shuihao,yonghu[i].dianhao);
}
for(i=0;i<6;i++)  
{
shuip[i]=yonghu[i].shuihao*shuihao;  
dianp[i]=yonghu[i].dianhao*dianhao;  
sum[i]=shuip[i]+dianp[i];  
shuihaop+=shuip[i];  
dianhaop+=dianp[i];  
shuihao+=yonghu[i].shuihao;  
dianhao+=yonghu[i].dianhao;
}
  
fp=fopen("charge.dat","w");
fputs("address shui(T) shuipay(Y) electric dianpay(Y) sum(Y)\n",fp);
for(i=0;i<6;i++)
{
    fprintf("%ld%d%.lf%d%.lf%.lf\n",yonghu[i].huhao,yonghu[i].shuihao,shuip[i],yonghu[i].dianhao,dianp[i],sum[i]);
}

fputs("total",fp);
fprintf("%ld%.lf%d%.lf%.lf",shuihao,shuip,dianhao,dianp,sdp);
fclose(fp);
getch();
}

typedef struct yonghu//struct yonghu就改了这个最基本的地方，其余的警告大都和数据类型有关，最好能自己改正~

好的，谢谢