Thread: Help Needed

Hi folks, this has got me stumped.
input: (from a file called ch7d) Output:
1 0 student ssessment attempt report
1 0
1 1 group 1
1 1 none 2
1 2 one 2
5 2 both 1
5 2 total 5
5 1
4 2 group 5
4 2 both 2
4 0 one 1
4 1 total 3
2 2
99 group 4
both 2
none 1
one 1
total 4

group 2
both 1
total 1

basically the figure on the left of the two relates to a student group number, the figure
on the right is the number of exams each student sat. The spec for the code is:

open and read the files
WHILE not at the end of the data(99)
group total = 0
store group as current group
output group heading
WHILE still processing current group and not at the end of the data
store attempts as current attempts
attempt toal = 0
WHILE still processing current attempts and still processing current group and not
at the end of the data
increment attempt total
read the next line.
IF current attempt is 2
output "both"
ELSE IF current attempt is 1
output "one"
ELSE
output "none"
output attempt total
accumulate group total
output group total

My code so far is:

#include<stdio.h>
#include<conio.h>

main()
{

int group,
attempt,
group_total,
current_attempt,
current_group,
attempt_total;

FILE *ch7d = fopen("ch7d.dat", "r");
fscanf(ch7d, "%d %d", &group, &attempt);
printf("Student Assessment Attempt Report\n");

while (group <= 99)
{
{
group_total = 0;
current_group = group;
printf("Group %d\n", current_group);
}
while (group = current_group && group <= 99)
{
current_attempt = attempt;
attempt_total = 0;
}
/*stuck from here*/
while ((attempt = current_attempt) && (group = current_group) && (group <= 99))
{
attempt_total += 1;
fscanf(ch7d, "\n%d %d", &group, &attempt);
}
if (current_attempt == 2)
{
printf("\nBoth ");
}
if else (current_attempt == 1)
{
printf("\nOne ");
}
else
{
printf("\nNone ");
}
printf("%d", attempt_total)
group_total???????


fclose(ch7d);
getch();
}

The program seems to get stuck on the 3rd while condition. The 2nd while appears fine as
I stuck a printf in there.

Anyone any ideas?? PLEASE!?!?!

Remember the = sign means assignment and == means equality.

//Change to == here like this
while (group == current_group && group <= 99)
{
current_attempt = attempt;
attempt_total = 0;
}
/*stuck from here*/
//Same change needed here
while ((attempt == current_attempt) && (group = current_group) && (group <= 99))
{
attempt_total += 1;
fscanf(ch7d, "\n%d %d", &group, &attempt);
}

I missed one on this line:

while ((attempt == current_attempt) && (group = current_group) && (group <= 99))

You also need to change all
group <= 99
to
group < 99

Here is an improved version.

Code:

#include<stdio.h>
#include<conio.h> 

int main() 
{ 

int group, 
attempt, 
group_total, 
current_attempt, 
current_group, 
attempt_total; 

FILE *ch7d = fopen("ch7d.dat", "r");
if (ch7d == NULL)
{
   printf("Unable to open file.\n");
   return 0;
} 
fscanf(ch7d, "%d %d", &group, &attempt); 
printf("Student Assessment Attempt Report\n"); 

while (group < 99)
{ 
   group_total = 0;
   current_group = group; 
   printf("\nGroup %d\n", current_group);
   while (group == current_group && group < 99)
   { 
      current_attempt = attempt; 
      attempt_total = 0; 
      /*stuck from here*/
      while ((attempt == current_attempt) && (group == current_group) && (group < 99)) 
      { 
         attempt_total += 1; 
         fscanf(ch7d, "\n%d %d", &group, &attempt);
         //getch();
      }
      if (current_attempt == 2)
      { 
         printf("Both "); 
      } 
      else if(current_attempt == 1)
      { 
         printf("One "); 
      } 
      else 
      { 
         printf("None "); 
      }
      printf("%d\n", attempt_total);
      group_total += attempt_total;
   }
   printf("Group total:%d\n", group_total);
}

fclose(ch7d); 
getch();
return 0;
}