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桂电c语言实验周信东函数 周信东c语言实验答案函数( 四 )

IT技术输入


d3=(x+x0)*(x+x0)+(y-y0)*(y-y0);
d4=(x+x0)*(x+x0)+(y+y0)*(y+y0);
if(d11d21d31d41)
h=0;
printf("该点高度为%d",h);
}
c语言程序设计(周信东版)的综合程序设计如下：编写程序 ， 从键盘输入某楼6家住户某月的水电消耗及水费和电费#includestdio.h
#includestdlib.h
#includestring.h
int main()
{
char user[4];
char waterNum[4];
char elecNum[4];
char inlinebuf[32];
char outlinebuf[32];
char pbuf[256];
FILE *fp1;
FILE *fp2;
int WaterNum=0;
int ElecNum=0;
int length =0;
int m=0;
int n=0;
int weishuflag=0;
int flagnum=0;
int i=0;
int j=0;
float waterPrice=0.0;
float elecPrice=0.0;
if((fp1=fopen("./input.dat","r"))==NULL)
{
printf("open input data error!\n");
return -1;
}
if((fp2=fopen("./change.dat","w"))==NULL)
{
printf("open input data error!\n");
return -1;
}
fseek(fp1,0,SEEK_END);
length = ftell(fp1);
fseek(fp1,0,SEEK_SET);
memset(pbuf,0,sizeof(pbuf));
printf("the input data length == %d\n",length);
fread(pbuf,length,1,fp1);
fseek(fp2, 0, SEEK_SET);
sprintf(outlinebuf,"住户\t\t水费\t\t电费\n");
fputs(outlinebuf, fp2);
while(length--)
{
if(pbuf[m]!='\n')
{
inlinebuf[n]=pbuf[m];
n++;
}
else
{
j = 0;
inlinebuf[n++]='\t'; //为处理每一行的最后一个数据（即用电量），需加入一个tab或空格键
inlinebuf[n] = '\0';//一行数据结束
while( inlinebuf[j] != '\0')
{
switch(flagnum)
{
case 0://用户
if(inlinebuf[j] != ' 'inlinebuf[j] != '\t')
{
user[i]=inlinebuf[j];
i++;
}
else
{
user[i]='\0';
flagnum++;//表示之前获取的是住户，下两个数据分别获取用水量与用电量
i=0;
}
break;
case 1://用水量
if(inlinebuf[j] != ' 'inlinebuf[j] != '\t')
{
waterNum[i]=inlinebuf[j];
i++;
}
else
{
waterNum[i]='\0';
weishuflag=i;//表示当前数据的位数，住户、用水量、用电量均限制为三位数以内
flagnum++;//表示下个数据获取的是用电量
if(weishuflag == 1)
{
WaterNum = waterNum[0] - 48;
}
else if(weishuflag == 2)
{
WaterNum = (waterNum[0] - 48)*10 + (waterNum[1] - 48);
}
else
{
WaterNum = (waterNum[0] - 48)*100 + (waterNum[1] - 48)*10 + (waterNum[2] - 48);
}
i=0;
weishuflag = 0;
}
break;
case 2://用电量
if(inlinebuf[j] != ' 'inlinebuf[j] != '\t')
{
elecNum[i]=inlinebuf[j];
i++;
}
else
{
elecNum[i]='\0';
weishuflag=i;//表示当前数据的位数，住户、用水量、用电量均限制为三位数以内
flagnum = 0;//表示一行三个数据获取完毕
if(weishuflag == 1)
{
ElecNum = elecNum[0] - 48;
}
else if(weishuflag == 2)
{
ElecNum = (elecNum[0] - 48)*10 + (elecNum[1] - 48);
}
else
{
ElecNum = (elecNum[0] - 48)*100 + (elecNum[1] - 48)*10 + (elecNum[2] - 48);
}
i=0;
weishuflag = 0;
}
break;
default:
break;
}
j++;
}
waterPrice = (float)WaterNum * 1.5;
elecPrice = (float)ElecNum * 0.5;
printf("The user == %s,waterNum == %d,elecNum == %d\n",user,WaterNum,ElecNum);//打印用户，用水量，用电量
printf("The user == %s,waterPrice == %.1f,elecPrice == %.1f\n\n",user,waterPrice,elecPrice);//打印用户，水费 ， 电费
sprintf(outlinebuf,"%3s \t\t%4.1f \t\t%4.1f\n",user,waterPrice,elecPrice);
fputs(outlinebuf, fp2);//写入每一行数据（数据格式为 住户 + 水费 + 电费）

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