UNIX for Dummies Questions & Answers

Hey, I want to have a C program which, for an existing file supplied by the command line argument (E.g. File1.txt) replaces all the occurrences of the words:

"We” or “we” by “I”
“a” by “the”
“A” by “The”.

Then print the replaced file. All other characters of the file are to be left unchanged.

I know basically to change a string of characters you use:
String.Replace("oldval","newval");

How would you go about doing this to an entire txt file???

Maybe use a loop or case statement?

Does anybody know any places to get code snippets for something like this.

Im not very experienced but looking to learn!!

You can usually replace instances of a word with another using something.. say sed, like this:

Code:

sed 's/a/the/g' somefile > someotherfile; mv someotherfile somefile