This is for C++

When given two strings as input, we must write a program that checks if one string is a substring of the other. If so, capitalize substring then print the new capitalized string. We must also ignore case when comparing strings Use old style c-strings (character arrays) or the string (#include ) . . . Example) Please enter the input filename: input.txt Please enter the output filename: output.txt The original strings are: Compile Pile/ Pile is a substring of Compile The new string is: "ComPILE" Content has been written to the file output.txt