编写一程序,将两个字符串连接起来的3种方法
1.用字符数组和自己书写的函数实现
自己写一个具有strcat函数功能的函数
实现代码如下:
#include<iostream> using namespace std; int main(){ char a[100],b[50]; void Strcat(char a[],char b[]); cout<<"please input first string:"<<endl; cin>>a; cout<<"please input second string:"<<endl; cin>>b; Strcat(a,b); cout<<"The new string: "<<a; cout<<endl; return 0; } void Strcat(char a[],char b[]){ int i,j; for(i=0;a[i]!='\0';i++); cout<<"Length of first string:"<<i<<endl; for(j=0;b[j]!='\0';j++,i++){ a[i]=b[j]; } cout<<"Length of second string:"<<j<<endl; }
2.用标准库中的strcat函数
使用strlen()函数求数组的大小,strcat()函数用来连接字符串
实现代码如下:
#include<iostream> #include<string> using namespace std; int main(){ char a[100],b[50]; cout<<"please input first string:"<<endl; cin>>a; cout<<"please input second string:"<<endl; cin>>b; cout<<"Length of first string :"<<strlen(a)<<endl; cout<<"Length of first string :"<<strlen(b)<<endl; cout<<"The new string: "<<strcat(a,b); cout<<endl; return 0; }
3.用string方法定义字符串变量
#include<iostream> #include<string> using namespace std; int main(){ string a,b; cout<<"please input first string:"<<endl; cin>>a; cout<<"please input second string:"<<endl; cin>>b; cout<<"New string :"<<(a+b)<<endl; return 0; }