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Answer to Question #458 in C++ for lily

Question #458
Write the statement(or statements) that uses function rand() to determine a random floating point number between 12.5 and 24.5 and assigns the number to variable ran1. How can I do this?
Expert's answer
You can do this next way:
1 #include "stdio.h"
2 #include <stdlib.h>
3 #include <time.h>
4
5 float randfloat() {
6 ....int i1 = rand(),
7 ........i2;
8 ....do {
9 ........i2 = rand();
10 ....} while (i2 < i1);
11 ....return i1*1./i2;
12 }
13 float randfloat(float from, float to) {
14 ....return from + (to-from)*randfloat();
15 }
16
17 int main() {
18 ....srand(time(NULL));
19 ....printf("%f %f %f\n", randfloat(12.5, 24.5), randfloat(12.5, 24.5), randfloa t(12.5, 24.5));
20 ....return 0;
21 }

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