Has to be in C++ language.

String fileName and integer guavaQuantity are read from input. Open fileName as an output file. If the file fails to open, use cout to output fileName followed by ": open operation failed.", and do not proceed to the code that writes to the file. Otherwise, write guavaQuantity followed by " guavas" to the opened file. End with a newline. Ex: If the input is data.txt 21 , then data.txt contains: 21 guavas