int main(int argc, char** argv)
{
// DECLARATIONS
int numParticipants=argc-1;
int *answers=(int *)malloc(NQUESTIONS*sizeof(int));
if(answers==0)
{
fputs("Malloc (answers) returned null!\n",stderr);
return -1;
}
// CRUDE ARGUMENT CHECKING
if(argc<2) fputs("Error: No argument supplied!\n", stderr);
for(int i=0;i<NQUESTIONS;++i)
{
answers[i]=(myrand()%4+1);
}
///////////////////////////////////////////////////////////////////
// 3a) how many right answered question a single participant have?
///////////////////////////////////////////////////////////////////
FILE *f;
int *r=(int *)malloc(numParticipants*sizeof(int));
if(r==0)
{
fputs("Malloc (r) returned null!\n",stderr);
return -1;
}
f=fopen("rightanswers_pp.txt","w");
fprintf(f,"number of right answers per participant:\n");
for(int i=0;i<numParticipants;++i)
{
r[i]=numberRightAnswersPerson(argv[i+1], answers);
fprintf(f,"participant %d : %d \n", i+1, r[i]); //write right answer per participant in file
}
fclose(f);
///////////////////////////////////////////////////////////////////
// 3c)1) average value, deviation value, median
///////////////////////////////////////////////////////////////////
//average
double rAvg=calcAvg(r,numParticipants);
printf("average how many right answered question per person %lf\n",rAvg);
//standard deviation
printf("standard deviation: %lf\n",calcStdDev(rAvg,r,numParticipants));
//median
printf("median: %lf\n",calcMedian(r,numParticipants));
printf("\n");
///////////////////////////////////////////////////
// 3b) calculate right answers of all per question
///////////////////////////////////////////////////
FILE *f2;
int sumRightAnswers[NQUESTIONS];
for(int i=0;i<NQUESTIONS;++i)
{
sumRightAnswers[i]=0;
}
f2=fopen("rightanswers_all.txt","w");
fprintf(f2,"number of all right answers per question:\n");
for(int i=0;i<numParticipants; ++i)
{
if (numberRightAnswersAllPersons(argv[i+1],sumRightAnswers, answers)!=0)
{
perror("Error reading file");
}
}
for(int i=0;i<NQUESTIONS;++i)
{
fprintf(f2,"%c : %d\n",'A'+i,sumRightAnswers[i]);
}
fclose(f2);
//average how many persons answered a single question right
double av_all=calcAvg(sumRightAnswers,NQUESTIONS);
printf("average how many persons answered a single question right: %lf\n",av_all);
//standard deviation
printf("standard deviation: %lf\n",calcStdDev(av_all,sumRightAnswers,NQUESTIONS));
//median
printf("median: %lf\n",calcMedian(sumRightAnswers,NQUESTIONS));
if(answers!=0)
{
free(answers);
answers=0;
}
if(r!=0)
{
free(r);
r=0;
}
return EXIT_SUCCESS;
}
int AutoCorr::countPeaks(const float* data, float &stdDev, int len, int peaks[])
{
const float epsilon = 0.0001;
int result = 0;
if (len < 2)
{
return 0;
}
int lastPeak = -1;
bool curr_up = true;
//Count borders, too
if (data[0] > data[1])
{
peaks[result] = 0;
result++;
lastPeak = 0;
curr_up = false;
}
int* distances = new int[len];
//Search for peaks
for (int i = 1; i < len - 1; i++)
{
bool next_up = curr_up;
// if (data[i] > data[i-1])
if (data[i] - data[i-1] > epsilon)
{
next_up = true;
}
// if (data[i] < data[i-1])
if (data[i] - data[i-1] < -epsilon)
{
next_up = false;
}
if (next_up == false && curr_up == true)
{
//peak detected
if (lastPeak != -1)
{
distances[result-1] = lastPeak - i;
}
peaks[result] = i - 1;
result++;
lastPeak = i - 1;
}
curr_up = next_up;
}
if (data[len-1] > data[len-2])
{
if (lastPeak != -1)
{
distances[result-1] = lastPeak - (len - 1);
}
peaks[result] = len - 1;
result++;
}
stdDev = calcStdDev(distances, result - 1);
return result;
}