copying contents of a file to another?

[ncwizad]

Hello,
Is there a simple way of copying one file into another from within an application.
Basically i'm writing a log file of the success/failiure of th e application. At the end it would be helpful to have a record of the data used in the application.
Ideally a function similar to fprintf(inputfile,"format",string);
except substituting the string for an axisting file.

 

[Salem]

Given two suitably opened files, this copies the file.

int ch;
while ( (ch=fgetc(in)) != EOF ) fputc(ch,out);

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