What part have you written and/or what specific question do you have?
- Did you get the binary file open?
- Did you fill the vector from the file?
- Did you find the start point of the string?
- Were you able to append characters to your string from the vector?
- Did you find the 'NULL' in the vector to know that you're done filling the string?
- Did you successfully call fopen?
- Did you successfully read the data with scanf?
We generally will not write your program for you, but will help when you show you're trying.