Thread: printing error

hi there
my prog prompts for the number of students in a class and then for a mark for each of them.then it is supose to display a histogram of how many student have the same mark, as a bar chart.am having problems on the displaying parts. i think is probably the way i declared the variables but am not sure anymore.please any idea

Code:

 #include <stdio.h>



void main(){

 int num;
 int i;
 int students[20];
 int marks [5];

 printf("How many students are in the class?  :");
 scanf("%d", &num);


 for(i=0;i<=num-1;i++){

 printf("Enter the marks for the student %d :" ,i+1);
 scanf("%d",&students[i]);
 }

 for(i=0;i<=4;i++){
 marks[i]=0;
 }

 for(i=0;i<num-1;i++){

if (students[i]==0){  marks[0]++;}
  else{ if (students[i]==1)   marks[1]++;
          else{  if (students[i]==2)   marks[2]++;
                    else {if (students[i]==3)   marks[3]++;
                              else{ if (students[i]==4)   marks[4]++;
                                  }
                          }
               }
       }
 }
 for(i=0;i<=4;i++){
 printf("%d\t   %d\n", i, asterix(marks[i]));
 }
   scanf("%d",&students[i]);
}

asterix(char n)
   {
    int i;
    char c=' ';
    char ch='*';

    if(n==0){
    printf("%c", c );
            }
    else{
        for(i=0;i<=n;i++)
            {
             printf("%c", ch);
            }
         }


         return;
   }

the output now is this:
How many students are in the class? :5
Enter the marks for the student 1 :1
Enter the marks for the student 2 :1
Enter the marks for the student 3 :1
Enter the marks for the student 4 :1
Enter the marks for the student 5 :1
0 1
*****1 1
2 1
3 1
4 1

It is supposed to be like this:

How many students are in the class? :5
Enter the marks for the student 1 :1
Enter the marks for the student 2 :1
Enter the marks for the student 3 :1
Enter the marks for the student 4 :1
Enter the marks for the student 5 :1
0
1 *****
2
3
4

hello. i really didn't solve any of your problems.....I got real bored and I thought that your idea was neat so I made my own program very similar to yours....just because i'm real new to programming and wanted to know if i could repeat a similar effect without looking at your code...i did.....mine prints out properly....its structure alot different than yours and probably a bit simpler....here it is.

Code:

#include <stdio.h>

void main()
{

	int a=0,b=0,c=0,d=0,e=0;
	int students;
	int x=1;
	char answer;
	
	printf("\n\t\t\t**************************");
	printf("\n\t\t\t*    The Clicker Poll    *");
	printf("\n\t\t\t**************************");
	printf("\n\n\n\t\t\t    Only A,B,C,D, or E    ");

	
	printf("\n\n\n\tNumber of Students that Clicked in :  ");
	scanf("%i",&students);
		
		while (students>0)  {
			
			printf("\tStudent #%i Answered: ",x);
			scanf("%s",&answer);
			if ((answer=='A') || (answer=='a')) {  
				a++;  }
			if ((answer=='B') || (answer=='b')) {
				b++;  }
			if ((answer=='C') || (answer=='c')) {
				c++;  }
			if ((answer=='D') || (answer=='d')) {
				d++;  }
			if ((answer=='E') || (answer=='e')) { 
				e++;  }
								
			students--;
			x++;
	}
	
	
	printf("\n\n\t\t\t ** GRAPHED **");
	printf("\n\t\t");

	printf("  Clicked A (%d Responses): ",a);
	while (a>0)   {
		printf("*");
		a--;      }
		printf("\n\t\t");
		printf("  Clicked B (%d Responses): ",b);
	while (b>0)   {
		printf("*");
		b--;      }
		printf("\n\t\t");
		printf("  Clicked C (%d Responses): ",c);
	while (c>0)   {
		printf("*");
		c--;      }
		printf("\n\t\t");
		printf("  Clicked D (%d Responses): ",d);
	while (d>0)   {
		printf("*");
		d--;      }
		printf("\n\t\t");
		printf("  Clicked E (%d Responses): ",e);
	while (e>0)   {
		printf("*");
		e--;      }

	printf("\n\n\t\t...press any key to continue...");
}

The output looks like:

Code:

                  **************************
                  *    The Clicker Poll    *
                  **************************


                      Only A,B,C,D, or E


  Number of Students that Clicked in :  6
  Student #1 Answered: A
  Student #2 Answered: C
  Student #3 Answered: D
  Student #4 Answered: D
  Student #5 Answered: E
  Student #6 Answered: A


                   ** GRAPHED **
            Clicked A (2 Responses): **
            Clicked B (0 Responses):
            Clicked C (1 Responses): *
            Clicked D (2 Responses): **
            Clicked E (1 Responses): *

you get the idea...hope you gets yours to work. sorry i couldnt offer much assistance i could never get yours to compile right for me...

....come to think about it........i added a new special effect to mine....something like:

Code:

Sleep(100):
printf("*\a");

using the #include <windows.h> to access the Sleep function and then adding a beep....so the program beeps when the graph is made, and the graph stats kind quickly astriek themselves across each one...makes it look kind of neat... just a thought.