Question

谁能帮我做一道c++题

题目是这样的.编写C++程序,由用户通过键盘输入12个温度值,将每个温度及其前一个温度的差计算出来.并输出到文件tempdata.dat,第一个温度值没有差值输出.最后通过cout输出平均值.

Answer 1

#include<iostream.h>
#include<fstream.h>
#include<stdlib.h>
#include<iomanip.h>
void main()
{
fstream file("D:tempdata.txt",ios::out);

float temp[12],d,s=0;

int i = 0;

if(!file)
{
cout<<"文件打开失败!";

exit(0);

}

cout<<"请输入十二个温度值:"<<endl;

for(i;i<=11;i++)

{
cin>>temp[i];

file<<temp[i]<<endl;
}

cout<<"第一个温度值是:"<<temp[0]<<endl;

for(i = 0;i<=10;i++)

{
d = temp[i+1]-temp[i];

s = s+temp[i];

cout<<"第"<<setw(2)<<i+2<<"与第"<<setw(2)<<i+1<<"个温度值的差值为"<<d<<endl;

file<<d<<endl;

}

cout<<"十二个温度的平均值为:"<<s/12.0<<endl;

file.close();

}

Answer 2

#include <iostream>
#include <fstream>
using namespace std;

static const int NUM = 12;

void main()
{
float data1, data2;
ofstream fout("tempdata.dat");
cout<<"输入12个温度值:";
float total = 0;
for(int i=0; i<NUM; ++i)
{
if(i==0) {cin>>data1; continue;}
cin>>data2;
fout<<(data2-data1)<<" ";
total+= (data2-data1);
data1 = data2;
}
cout<<"平均值:"<<(total/(NUM-1))<<endl;
}

Answer 3

int temperatureValue[12];
//Pseudocode
//for(int i = 0; i < 12; ++i)
{
// input temperatureValue;
}

int totalTemperatureValue = 0;
for (int i = 0; i < 12; ++i)
{
totalTemperatureValue += temperatureValue[i];
if(i == 0)
{
continue;
}
output temperatureValue[i] - temperatureValue[i - 1] into tempdata.dat
}

cout << totalTemperatureValue / 12 << endl;