Array Program

I have to write a program that deals with arrays. I think I am doing this totally wrong. Do I need a for loop to do the increment?

Code:

    11
    12  Write a C program (named pe4.c) will prompt
    13  the user for  10 ints, each in the range
    14  0 - 9 inclusive.
    15
    16  Compute a histogram for these 10 numbers (e.g.
    17  determine how many times each number occurred.
    18  Display the list in the format shown below.
    19  See 'pe4.exe' for the output format.
    20
    21  HINT: to solve this problem, create an int array
    22  of size 10. Initialize the array to all zeroes.
    23  When a value is entered, increment the array
    24  element whose subscript is the same as the value entered.
    25  Finally, display the resulting array.
    26  After the display of the histogram,
    27  you program should output: PROGRAM ENDS followed
    28  by a newline character.
    29
    30
    31  ASSUMPTIONS: all values entered are C ints in
    32  the range 0-9 inclusive.  You do not have to
    33  check that values are in this range.
    34
    35
    36  EXAMPLE:
    37
    38  Enter value: 9
    39  Enter value: 0
    40  Enter value: 0
    41  Enter value: 1
    42  Enter value: 1
    43  Enter value: 8
    44  Enter value: 2
    45  Enter value: 8
    46  Enter value: 8
    47  Enter value: 0
    48  Histogram: 3 2 1 0 0 0 0 0 3 1
    49  PROGRAM ENDS
    50
    51  This example shows that the user entered
    52  3 zeroes, 2 ones, 1 two, no threes, no fours,
    53  no fives, no sixes, no sevens, 3 eights, and 1
    54  nine.

I have this and I think I went in the wrong direction:

Code:

     7  #include <stdio.h>
     8  #define N 10
     9
    10  int main (void)
    11
    12  {
    13
    14  int a[10] = {0};
    15
    16  printf("Enter value: ");
    17  scanf("%d", &a[0]);
    18  printf("Enter value: ");
    19  scanf("%d", &a[1]);
    20  printf("Enter value: ");
    21  scanf("%d", &a[2]);
    22  printf("Enter value: ");
    23  scanf("%d", &a[3]);
    24  printf("Enter value: ");
    25  scanf("%d", &a[4]);
    26  printf("Enter value: ");
    27  scanf("%d", &a[5]);
    28  printf("Enter value: ");
    29  scanf("%d", &a[6]);
    30  printf("Enter value: ");
    31  scanf("%d", &a[7]);
    32  printf("Enter value: ");
    33  scanf("%d", &a[8]);
    34  printf("Enter value: ");
    35  scanf("%d", &a[9]);
    36
    37  printf("a[%d]");
    38  printf("PROGRAM ENDS\n");
    39
    40  return 0;
    41  }

you need to read about loops

by the way, the point of

Code:

#define N 10

is so you can do this

Code:

int a[N] = {0};

It's bad practice to hard code constants. Now, as the above poster said, go read about loops like you already should have...

Originally Posted by vart

you need to read about loops

Exactly, lol

Hi Alex. I spent quite a bit of time composing a "for loop" tutorial for you in this thread. Please go back and review.

Help writing a program

Todd

Your printf("a[%d") is missing a variable in which to read the integer value to print.

printf("a[%d", x);

is more like it