Which C++ header file(s) are essentially required to be included to ru

1.	Which C++ header file(s) are essentially required to be included to run/execute the following C++ code :void main(){char word1="Hello",word2="Friends";strcat(word1,word2);cout<<word1;}
Answer» iostream.h string.h

Which C++ header file(s) are essentially required to be included to run/execute the following C++ code :void main(){char word1="Hello",word2="Friends";strcat(word1,word2);cout<<word1;}

Answer»

iostream.h

string.h

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Which C++ header file(s) are essentially required to be included to run/execute the following C++ code :void main(){char *word1="Hello",*word2="Friends";strcat(word1,word2);cout&lt;&lt;word1;}

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Which C++ header file(s) are essentially required to be included to run/execute the following C++ code :void main(){char word1="Hello",word2="Friends";strcat(word1,word2);cout<<word1;}