chapter 4 第二部分

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课本习题4

#include <iostream>#include <iomanip>using namespace std;int main (){char a[100];    int i,daxie,xiaoxie,space,number,other;cout<<"请输入字符长度小于100的文字:";cin.get(a,100);cout<<"the length of string is "<<strlen(a)<<endl;for(i=0;i<100;i++){if (a[i]>='A'&&a[i]<='Z')daxie++;else if(a[i]>='a'&&a[i]<='z')xiaoxie++;else if(a[i]>='0'&&a[i]<='9')number++;else if(a[i]==' ')space++;else if (a[i]=='\0')other=strlen(a)-daxie-xiaoxie-number-space;}cout<<"其中大写字母的个数为:"<<daxie<<endl;cout <<"其中小写字母的个数为:"<<xiaoxie<<endl;    cout<<"其中数字的个数为:"<<number<<endl;cout<<"其他字符的个数为:"<<other<<endl;cout<<"空格的个数为:"<<space<<endl;return 0;}

习题五：

#include <iostream>#include <iomanip>using namespace std;int main (){char str[100];    cout<<"please input string:";cin.get(str,100);cout<<"字符串"<<str<<"的反向字符串为:\n";for(int i =strlen(str)-1;i>=0;i--)cout<<str[i];cout<<"the length of string"<<str<<"is"<<strlen(str)<<endl;return 0;}

#include <iostream>#include <iomanip>using namespace std;int main (){char a[100],b[100];int i,j=0;    cout<<"please input string:";cin.get(a,100);for(i=0;i<100;i++){if(a[i]>='0'&&a[i]<='9')continue;b[j]=a[i];j++;}b[j]='\0';cout<<"删除数字后的字符串为:"<<b<<endl;cout<<"字符串的长度为:"<<j<<endl;return 0;}

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