#include<iostream>
using namespace std;
int main()
{
double hTemp[7];
double lTemp[7];
for(int i=0;i<7;++i){
if(i==0)
cout<<"今天是星期日,请输入今天气温值:"<<endl;
else
cout<<"今天是星期"<<i<<",请输入今天的气温值:"<<endl;
cout<<"最高温度:";
cin >> hTemp[i];
cout<<"最低温度:";
cin >> lTemp[i];
while (hTemp[i]<lTemp[i]||hTemp[i]<0||lTemp[i]<0){
cout<<"你输入的气温值有错误,请重输"<<endl;
cout<<"最高温度:";
cin >> hTemp[i];
cout<<"最低温度:";
cin >> lTemp[i];
}
}
//计算温度
double avgH=0;
double avgL=0;
for(int i=0;i<7;++i){
avgH+=hTemp[i];
avgL+=lTemp[i];
}
avgH=avgH/7;
avgL=avgL/7;
cout<<"本周平均最高气温为"<<avgH<<"度。"<<endl;
cout<<"本周平均最低气温为"<<avgL<<"度。"<<endl;
return 0;
}
第五题:
#include<iostream>
using namespace std;
int main()
{
cout<<"Please input a int Value:"<<endl;
int iValue;
cin>>iValue;
if(iValue<=0){
cout<<"必须是正数"<<endl;
return 0;
}
//count
int temp=iValue;
int iCount=0;
while(temp){
temp=temp/10;
iCount++;
}
int *iArr=new int[iCount];
temp=iValue;
for(int i=0;i<iCount;i++)
{
iArr[i]=temp%10;
temp/=10;
}
int i,j;
for(i=0,j=iCount-1;i<j;++i,--j)
{
if(iArr[i]!=iArr[j])
break;
}
if(i>=j)
cout<<"这是回文数"<<endl;
else
cout<<"这不是回文数"<<endl;
delete []iArr;
return 0;
}
第七题:
#include<iostream>
#include<cmath>
using namespace std;
struct Root{
double x1;
double x2;
bool brt;
};
Root Func2(double a, double b, double c){
//判断是否有实根
if(b*b-4*a*c<0){
cout<<"本方程没有实根"<<endl;
Root rt;
rt.x1=rt.x2=0;
rt.brt=false;
return rt;
}
Root root;
double sq=sqrt(b*b-4*a*c);
root.x1=(-b+sq)/(2*a);
root.x2=(-b-sq)/(2*a);
root.brt=true;
return root;
}
int main()
{
Root rt=Func2(1,-1,-6);
if(rt.brt)
cout<<"x1="<<rt.x1<<"/nx2="<<rt.x2<<endl;
return 0;
}
第八题:
#include<iostream>
#include<cstring>
using namespace std;
int main()
{
cout<<"请输入一个字符串"<<endl;
char str[50];
cin>>str;
int iCap=0;
int iSmall=0;
int num=0;
for(int i=0;str[i]!='/0';++i){
if(str[i]>='A'&&str[i]<='Z')
++iCap;
if(str[i]>='0'&&str[i]<='9')
++num;
if(str[i]>='a'&&str[i]<='z')
++iSmall;
}
cout<<"本字符串有大写字母"<<iCap<<"个"<<endl;
cout<<"本字符串有小写字母"<<iSmall<<"个"<<endl;
cout<<"本字符串有数字"<<num<<"个"<<endl;
return 0;
}