#include<time.h>
#include<stdlib.h>
#include<stdio.h>
 
double float_rand(int nLow, int nHigh){
	double dec_part = (rand()%100)*0.01;
	float int_part = (rand()%(nHigh-nLow))+nLow;;
	return int_part+dec_part;
}
 
double getNum(double target, double mistake){
	mistake/=100;
	return float_rand(target*(1-mistake), target*(1+mistake));
}
 
double count_mis(double target, double rand){
	return (double)((rand-target)/target)*100;
}
int main(int argc, char *argv[]){
	printf("A X C\n");
	int i,count=50;
	(unsigned)time(NULL);
	double target=250;
	double mistake=0.4;
	double a=target,b;
	double sum=0;
	for(i=0;i<count;i++){
		b=getNum(a, mistake);
		sum+=(b);
		printf("%.2f %.2f %.2f\n", a, b, count_mis(a,b));
		a=b;
	}
	target*=count;
	printf("----------\nA X C\n%.2f %.2f %.2f", sum, target, count_mis(target, sum));
	return 0;
}
 

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