串连接

问题：字符串结尾记得加'\0';

发现自己代码写的真烂，逻辑太简单了。。。

代码：

?

#include <iostream>

using namespace std;

 

int main()

{

    char *s1="hello";

    char *s2="world";

    char *c;

    char *c1;

    int len1,len2;

    len1=len2=0;

    c=s1;

    while(c[len1]!='\0')

        len1++;

    c=s2;

    while(c[len2]!='\0')

        len2++;

    c1=(char *)malloc((len1+len2+1)*sizeof(char));

    int k=0,j=0;

    while(s1[k]!='\0')

    {

        c1[k]=s1[k];

        k++;

    }

    while(s2[j]!='\0')

    {

        c1[k++]=s2[j];

        j++;

    }

    c1[k]='\0';

    cout<<c1<<endl;

}

运行结果：