Input
Output
#include <iostream> #include <cstring> using namespace std; int main () { char str1[30] = "Welcome to"; char str2[30] = " Onlinetpoint"; int str3; strcat( str1, str2); cout << "String concatenate str1 & str2: " << str1 << endl; /* length of string str1 */ str3=strlen( str1); cout << "Length of string str1 is: "<< str3 ; return 0; }