/* runs the program */
int main(int argc, char ** argv) {
char i_name[MAXNAME + 1] ; /* name of current entry in file */
int i_grade ; /* grade of current entry in file */
int i; /* counter */
/* file i/o to read in file for grades */
FILE *inputF ;
char *mode = "r" ;
/* store the file handle */
inputF = fopen(argv[1], mode) ;
/* if cannot read file */
if(inputF == NULL) {
fprintf(stderr, "Invalid input file.") ;
exit(1) ;
}
/* pass in the address of "grade" */
while(fscanf(inputF, "%s %d", i_name, &i_grade) != EOF) {
i_name[0] = toupper(i_name[0]) ;
struct grade_entry entry ;
entry.name = calloc( strlen( i_name ) + 1, sizeof( char ) ) ;
strncpy(entry.name, i_name, strlen( i_name ) ) ;
entry.grade = i_grade ;
grade_list[numgrades] = entry ;
numgrades++ ;
}
printf("\nUnsorted data: \n");
print_grades();
printf("\nSort by name: \n");
sort_by_name();
print_grades();
printf("\nSort by grade: \n");
sort_by_grade();
print_grades();
printf("\nMean: %d\n", calcMean(grade_list, numgrades));
printf("Median: %d\n", calcMedian(grade_list, numgrades));
return 0;
}
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;
}
