l5_28.cpp

《C++程序设计教程》电子教案及例题源码

#include <iostream.h>
#include <string.h>
void stringcat(char *s1, char *s2);
void main()
{
	char a[20] = "abcde";
	char b[] = "fgh123";
	cout << a << endl;
	cout << b << endl;
	stringcat(a,b);
	cout << a << endl;
	cout << b << endl;
}
void stringcat(char *s1, char *s2)
{
	int i,len;
	len = strlen(s1);
	for(i=0; s2[i]!='\0'; i++)
	{
		s1[len+i] = s2[i];
	}
	s1[len+i] = '\0';
}