c/c++ No.18 字符串连接

char *strcat(char *dst, char const *src);

#include <iostream>#include <cstring>using namespace std;  int main() {    char a[101] = "Hello ";    char b[101] = "World";    cout << strcat(a, b) << endl;    cout << a << endl;    cout << b << endl;    cout << strcat(a, "!") << endl;    return 0;  }  

char *strncat(char *dst, char const *src, size_t len);

#include <iostream>#include <cstring>using namespace std;  int main() {    char a[101] = "00000000000000";    char b[11] = "1234567890";    cout << a << endl;    cout << strncat(a + 5, b, 5) << endl;    cout << a << endl;    return 0;  }