Print a number to variable number of decimal places

Question

I wanted to print a number to variable number of decimal places in C. I have written the code

#include<stdio.h>
main()
    {   int a;
        printf("Upto which number of decimal places you want to print value of '2.554648' ?");
        scanf("%d", &a);
        printf("Value of '2.554648 upto %d number of decimal places = %.af", a, 2.554648);
        return 0;
    }

Answer 1

Use * in printf() to mark how many decimal places you want:

#include <stdio.h>

int main(void)
{
    int a;

    printf("Upto which number of decimal places you want to print value of '2.554648' ?");
    scanf("%d", &a);
    printf("Value of '2.554648 upto %d number of decimal places = %.*f", a, a, 2.554648);

    return 0;
}