[FIXED] How can I get rid of zeros, if decimal is entered it prints decimal, but if whole number is entered it prints .00?

Issue

This program prints overlapping of two intervals. But the problem is, if I enter, for example numbers : 1.1 -1.1 1.1 1.1, it prints out the whole number. I've tried writing %1.1f in last printf command, but it turned out to be even worse, because then, if I enter 1 2 1 1, it prints out 1.0 and 4.0. How can I get the proper print if I enter decimale or int?

#include <math.h>

int main() {
    float a,b,c,x,derivative;
    printf("Input coefficients a, b i c: ");
    scanf("%f %f %f",&a,&b,&c);
    if((a<(-10)) || (a>10) || (b<(-10)) || (b>10) || (c<(-10)) || (c>10)){
        printf("Coefficients a, b i c do not belong in range of (-10,10).");
        return 1;
    }
    printf("Input point x: ");
    scanf("%f",&x);
    derivative=(2*a*x)+b+(c*0);
    printf("First derivation in point x=%.f je %.f.",x,derivative);
    return 0;
}

Solution

You can use the "%g" format specifier to display floating-point numbers in the shortest possible way:

printf("First derivation in point x=%g je %g",x,derivative);

Answered By - Adrian Mole

Answer Checked By - Timothy Miller (PHPFixing Admin)