Dynamic Float Format Specifier in C

Question

Is there any way to have a user inputed float format specifier? For example, if I print this.

float c = 15.0123
printf(\"%.2f\", c);

// outputs: 15.01


        

Answer 1

The precision can be specified by an argument with the asterisk *. This is called an argument-supplied precision.

float c = 15.0123;
int m = 2;
printf("%.*f", m,  c);

Answer 2

printf("%.*f", n, c); that will print out c with n places after the decimal.