A.1.6 Formatting output

We show how to insert the result of a computation inside a text by using strings. First we compute the powers of 2 and comment the result with some text. Then we do the same and give the output a nice format by computing and adding appropriate space.

// The powers of 2: int n; for (n = 2; n <= 128; n = n * 2) {"n = " + string (n);} ==> n = 2 ==> n = 4 ==> n = 8 ==> n = 16 ==> n = 32 ==> n = 64 ==> n = 128 // The powers of 2 in a nice format int j; string space = ""; for (n = 2; n <= 128; n = n * 2) { space = ""; for (j = 1; j <= 5 - size (string (n)); j = j+1) { space = space + " "; } "n =" + space + string (n); } ==> n = 2 ==> n = 4 ==> n = 8 ==> n = 16 ==> n = 32 ==> n = 64 ==> n = 128