C format code for positive and negative float numbers - c

Question

How can I force printf format codes like %f to produce aligned padded output for both positive and negative numbers. The following program is a minimal yet complete example of my problem:
#include<stdio.h>
#include<stdlib.h>
int main(int argc, char *argv[])
{
int step = 1;
float score = 0.1;
float phi = 0.1;
float rho = 0.2;
printf(" # score phi rho\n");
printf("%2d %2.3f %1.2f %1.2f\n", step, score, phi, rho);
step++;
score++;
phi++;
rho++;
printf("%2d %2.3f %1.2f %1.2f\n", step, score, phi, rho);
step++;
score -= 1.2;
phi++;
rho++;
printf("%2d %2.3f %1.2f %1.2f\n", step, score, phi, rho);
return 0;
}
and here is the result:
# score phi rho
1 0.100 0.10 0.20
2 1.100 1.10 1.20
3 -0.100 2.10 2.20
I wanted to have an output like
# score phi rho
1 +0.100 0.10 0.20
2 +1.100 1.10 1.20
3 -0.100 2.10 2.20
or
# score phi rho
1 0.100 0.10 0.20
2 1.100 1.10 1.20
3 -0.10 2.10 2.20
My current bad solution is an if-else statement conditioned on the sign of score variable to choose from two different printfs for plus and minus signs.

Answer 1

From the format specification syntax, the printf conversion specification follows
%[flags][width][.precision][size]type
So, if we set the flag directive to +, sign (+ or -) appears as a prefix of the output value. For example,
printf("%+5.2f\n%+5.2f\n", -19.86, 19.86); // prints -19.86 \newline +19.86