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| 5.9.1
//计算两个整数之间数的和
#include <iostream>
using namespace std;
int main()
{
int a, b,sum;
int c = 0;
cin >> a >> b; // a<b;
if (a > b)
{
int t;
t = a; a = b; b = t;
}
while (a != b)
{
c = c + a;
a = a++;
}
sum = c + b;
cout << sum << endl;
return 0;
}
5.9.2
#include <iostream>
using namespace std;
int main()
{
int a;
int sum = 0;
do{
cin >> a;
sum = sum + a;
cout << sum << endl;
} while (a != 0);
cout << "完成！\n";
return 0;
}
5.9.3
#include <iostream>
#include <cmath>
using namespace std;
const float inst = 0.1;
const int money = 100;
int main()
{
double Dh, Ce;
int year=1;
do
{
Dh = inst * money * year;
Ce = pow(1.05, year)*money-money;
year++;
} while (Ce < Dh);
cout << Dh << " " << Ce << endl;
cout << year << endl;
return 0;
}
5.9.4
#include <iostream>
using namespace std;
int main()
{
char* month[] = { "一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月" };
int sale[12];
int i;
int sum = 0;
for (i=0;i<12;i++)
{
cout << month[i] << ": ";
cin >> sale[i];
}
for (i=0;i<12;i++)
{
sum += sale[i];
}
cout << sum << endl;
return 0;
}
5.9.5
#include <iostream>
using namespace std;
int main()
{
char* time[3][12] = { "一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月",
"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月" ,
"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"
};
int sale[3][12];
int i,j;
int sum = 0;
for (i = 0; i < 3; i++)
for(j=0;j<12;j++)
{
cout << time[i][j] << ": ";
cin >> sale[i][j];
}
for (i = 0; i < 3; i++)
for(j=0;j<12;j++)
{
sum += sale[i][j];
}
cout << sum << endl;
return 0;
}
5.9.6
#include<iostream>
#include <string>
using namespace std;
struct car
{
string producer;
int time;
};
int main()
{
int n,i;
cout << "How...? ";
cin >> n;
car * name = new car[n]; // delete [] neme
for (i=0;i<n;i++)
{
cout << "Car #:" << i + 1 << endl;
cout << "Make: ";
cin.get();
getline(cin, name[i].producer);
cout << "Time: ";
cin >> name[i].time;
}
cout << "Here...: \n";
for (int j = 0; j < n; j++)
{
cout << name[j].time << " " << name[j].producer << '\n';
}
delete[] name;
return 0;
}
5.9.7
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
int i=0;
char words[10]="0";
cout << "请输入单词： \n";
cin >> words;
while (strcmp(words, "done") != 0)
{
cin >> words;
i++;
}
cout << "\n共输入了" << i << "个单词\n";
return 0;
}
5.9.8
#include <iostream>
#include <string>
using namespace std;
int main()
{
int i = 0;
string words;
cout << "请输入单词： \n";
cin >> words;
while (!("done"==words))
{
cin >> words;
i++;
}
cout << "\n共输入了" << i << "个单词\n";
return 0;
}
5.9.9
#include<iostream>
using namespace std;
int main()
{
int n,i,j;
cout << "Enter number of rows: ";
cin >> n;
for (i = 1; i <= n; i++)
{
for (j = 1; j <=n-i; j++)
cout << ".";
for (j=1;j<=i;j++)
{
cout <<"*";
}
cout << endl;
}
return 0;
}
|