#include <stdio.h>
#include <math.h>
 
float xf_round1_f(float input, int prec) {
    printf("%f\t",input);
    int trunc = round(input * pow(10, prec));
    printf("%f\t",(float)trunc);
    input=(float)trunc / pow(10, prec);
    printf("%f\t",input);
    input=nextafterf(input, input+1.0);
    printf("%f\n",input);
    return (input);
}
 
int main(void) {
    xf_round1_f(49.975002f, 3);
    xf_round1_f(49.980000f, 3);
    xf_round1_f(49.985001f, 3);
    xf_round1_f(49.990002f, 3);
    xf_round1_f(49.995003f, 3);
    xf_round1_f(50.000000f, 3);
    return 0;
}
 

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