Output formatting

Question

How do I make the output in w way so every column would be aligned? My current formatting is:

        printf("Posting #%d,  Timestamp: %d,  Light: %d,  Temperature: %d,  Humidity:  %d\n", i, valArr[i][j], valArr[i][j+1], valArr[i][j+2], valArr[i][j+3]);

Answer 1

Use %2d in your printf instead of %d.

Answer 2

As pointed out in the first answer to the question, %2d will print an integer two characters wide, %3d will print a decimal integers, at least 3 characters wide.

There's also other formatting options in printf for floating point variables and octal/hex, for example:

%6f will print as floating point, at least 6 characters wide.

%.2f will print as floating point, 2 characters after the point.

You can omit either one from the statement, it's still valid. Simply the width will not be constrained.