int main()
{
file_t* file;
FILE* infile;
char buf[256];
int result = 1;
file_itr_t* itr;
char* data;
u32 len;
uint line;
if ((file = file_open("sorted.file", 1)) == NULL) {
fprintf(stderr, "Failed to open sorted.file\n");
return 1;
}
infile = fopen("unsorted.txt", "r");
if (infile == NULL) {
fprintf(stderr, "Failed to open unsorted.txt\n");
file_close(file);
return 1;
}
line = 1;
while (fgets(buf, 256, infile) != NULL) {
len = strlen(buf) - 1;
buf[len] = 0;
if (file_insert(file, buf, len + 1) < 0) {
fprintf(stderr, "file_insert failed on key %s (line %d)\n", buf,
line);
goto done;
}
line++;
}
fprintf(stderr, "Added %d records\n", line);
if (file_sort(file) < 0) {
fprintf(stderr, "failed to sort file\n");
goto done;
}
file_close(file);
fclose(infile);
if ((file = file_open("sorted.file", 0)) == NULL) {
fprintf(stderr, "Failed to open sorted.file\n");
return 1;
}
if ((itr = file_itr_init(file)) == NULL) {
fprintf(stderr, "file_itr_init failed");
goto done;
}
while ((result = file_itr_next(itr, &data, &len)) == 0)
printf("%s\n", data);
if (result < 0) {
fprintf(stderr, "file_itr_next failed\n");
result = 1;
}
file_itr_finish(itr);
done:
fclose(infile);
file_close(file);
return result;
}
int main()
{
int selection;;
//Loop with switch statement drives the user interface
//User keeps entering options until they quit
do
{
printf("Please Select an Option\n");
printf("1-Computing pi\n");
printf("2-Computing Square Root\n");
printf("3-Displaying Primes\n");
printf("4-Processing Grades\n");
printf("5-Computing Tax\n");
printf("6-Solving Quadratic\n");
printf("7-Computing Factorials\n");
printf("8-Counting File\n");
printf("9-Sorting File\n");
printf("10-Student File\n");
printf("11-Quit\n");
scanf("%d",&selection);
switch(selection)
{
case 1: //Compute pi
{
int n;
printf("How many terms of pi do you wish to compute: ");
scanf("%d",&n);
printf("pi to %d terms is %lf\n",n,compute_pi(n));
break;
}
case 2: //Compute square root
{
double n;
printf("Which square root do you wish to compute: ");
scanf("%lf",&n);
printf("the square root of %lf is %lf\n",n,compute_sqrt(n));
break;
}
case 3: //Display primes
{
int n;
printf("Enter an number to calculate primes up to: ");
scanf("%d",&n);
display_primes(n);
break;
}
case 4: //Process grades
{
process_scores();
break;
}
case 5: //Compute tax
{
int income;
char status[10];
char state;
printf("What is your income: ");
scanf("%d",&income);
printf("In state or out of state: ");
scanf("\n%c",&state);
printf("Are you single or married: ");
scanf("%s",status);
printf("Your taxes are: %lf\n",compute_tax(income,status,state));
break;
}
case 6: //Solving quadratic
{
double solution1;
double solution2;
double a;
double b;
double c;
int solutions;
printf("enter a: ");
scanf("%lf",&a);
printf("enter b: ");
scanf("%lf",&b);
printf("enter c: ");
scanf("%lf",&c);
solutions = quadratic(a,b,c,&solution1,&solution2);
if (solutions)
{
printf("Solution 1: %lf\n",solution1);
printf("Solution 2: %lf\n",solution2);
}
else
{
printf("There were no solutions\n");
}
break;
}
case 7: //Computing factorial
{
int n;
printf("Enter the factorial to compute: ");
scanf("%d",&n);
printf("%d! is %d\n",n, factorial(n));
break;
}
case 8: //counting file
{
char input_file[50];
int characters;
int lines;
printf("Enter the file name to open: ");
scanf("%s",input_file);
file_count(input_file,&characters,&lines);
printf("Number of lines: %d\n",lines);
printf("Number of characters including EOF: %d\n",characters);
break;
}
case 9: //sorting file
{
char input_file[50];
char output_file[50];
printf("Enter the input file name: ");
scanf("%s",input_file);
printf("Enter the output file name: ");
scanf("%s",output_file);
file_sort(input_file,output_file);
printf("Operation Complete\n");
break;
}
case 10: //student file
{
char input_file[50];
printf("Enter the input file name: ");
scanf("%s",input_file);
file_student(input_file);
printf("Operation Complete\n");
break;
}
case 11: //quit
{
break;
}
default: //Error for incorrect entries
printf("Your entry is invalid. Please try again\n");
}
}while(selection != 11); //do until user quits
return 0;
}
