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Greetings everyone,
I have a C programming exams tomorrow and was wondering if anyone know some sites where I can find some worked out assignment, or solutions to exams papers or even additional exercise, that will help me in my revision. The topics I need include:
- prinft and scanf in C
- using if and else
- using loops
- arrays (basic)
Thanks for any help...
Hi Salem,
Thanks for your reply... howstuffworks.com has tutorials only. As I mentioned, I'm looking for some online excercise/past exams/assignments on C, that will help me in my revision.
look at getaclass.com, from there in research papers there is COSC 1420, they have some exams
Hi there,
Thanks a lot for the links... That's what I was looking for! If you know more sites that have these sort of exams papers let me know...
Btw, while reviewing one of the questions on another site, I came up with a prob that asks me to display the following using loops:
----1----
---2-2---
--3-3-4--
-4-4-4-4-
5-5-5-5-5
Any idea how this can be achived?
Do you have to display the dashes ( '-' ), and is there a limit to the numbers of the binary tree like structure?
You d certainly use a for loop of some kind I believe. Knowing a limit would make it easier for sure!
Cheers,
Johannes
this is extremely crude...lol....but i am sure you can improvise on it:-
Code:#include<stdio.h>
#include<stdlib.h>
int main()
{
int y=0;
char t='-';
for(y=1;y<=5;y++)
{
switch(y)
{
case 1: printf("%c%c%c%c%d%c%c%c%c\n",t,t,t,t,y,t,t,t,t);
break;
case 2: printf("%c%c%c%d%c%d%c%c%c\n",t,t,t,y,t,y,t,t,t);
break;
case 3: printf("%c%c%d%c%d%c%d%c%c\n",t,t,y,t,y,t,y,t,t);
break;
case 4: printf("%c%d%c%d%c%d%c%d%c\n",t,y,t,y,t,y,t,y,t);
break;
case 5: printf("%d%c%d%c%d%c%d%c%d\n",y,t,y,t,y,t,y,t,y);
break;
default: break;
}
}
system("PAUSE");
return 0;
}
>Any idea how this can be achived?
You can do it a bunch of ways. It's a bit more challenging if you have to have all of the dashes like in your post. Here's one way:
Code:#include <stdio.h>
static void drawLine(int nlead, char lead, int nfill, char fill)
{
int i;
for (i = 0; i < nlead; i++)
putchar(lead);
/*
* Print fill characters with every other
* character being lead (e.g. 4-4-4-4)
*/
for (i = 0; i < nfill; i++)
{
putchar(fill);
if (i < nfill - 1)
putchar(lead);
}
for (i = 0; i < nlead; i++)
putchar(lead);
putchar('\n');
}
int main(void)
{
int nlead = 0; /* Number of leading characters */
int nfill = 1; /* Number of fill characters (pyramid) */
char lead = '-'; /* Leading character to print */
char fill = '1'; /* Pyramid character to print */
printf("Enter the number of lines (Under 10): ");
fflush(stdout);
if (scanf("%4d", &nlead) != 1 || nlead > 9)
fprintf(stderr, "Invalid input\n");
else
{
while (--nlead >= 0)
drawLine(nlead, lead, nfill++, fill++);
}
return 0;
}
>>Any idea how this can be achived?
Why not try doing it yourself, then post your code when you have trouble with it.
Quote:
Originally posted by shain
Hi there,
Thanks a lot for the links... That's what I was looking for! If you know more sites that have these sort of exams papers let me know...
Btw, while reviewing one of the questions on another site, I came up with a prob that asks me to display the following using loops:
----1----
---2-2---
--3-3-4--
-4-4-4-4-
5-5-5-5-5
Any idea how this can be achived?
That code is only meant to go from rows 1 to 9, although it can fit a 10th that is missing a dash at the end. I stick to Win32 applications, not consoles so forgive me if you wanted another method.Code:#include <windows.h>
#include <malloc.h>
#include <iostream.h>
void DrawCrap(int Dashes, char **CharStuff);
int main()
{
char *SomeChars;
DrawCrap(17,&SomeChars);
cout << SomeChars;
free(SomeChars);
return 0;
}
void DrawCrap(int Dashes, char **CharStuff)
{
//Dashes must be an ODD number!
char *cPointer=NULL;
char *cNumber=NULL;
int Lines=0;
int cLine=0;
int cIndex=0;
Lines = (((Dashes-1)/2)+1);
cPointer = (char *)calloc((Dashes*Lines*2)+(2*Lines)+1+500, sizeof(char)); //Only meant to lazily allocate enough space.
if(cPointer == NULL)
{
MessageBox(NULL, "Error allocating memory!","Error",MB_OK);
return;
}
ZeroMemory(cPointer, ((Dashes*Lines)+(2*Lines)+1));
cNumber = (char *)calloc(3, sizeof(char));
if(cNumber == NULL)
{
MessageBox(NULL, "Error allocating memory!","Error",MB_OK);
return;
}
do
{
//Add Dashes:
for(int i=0;i<Dashes;i++)
{
cPointer[cIndex+i] = '-';
}
//Find starting Number-Index for this line:
cIndex += ((Dashes+1)/2) - cLine - 1;
//Add Numbers Between Dashes:
for(int x=0;x<(cLine+1);x++)
{
ZeroMemory(cNumber, 3);
itoa((cLine + 1),cNumber,10);
for(int y=0;y<(int)strlen(cNumber);y++)
{
cPointer[cIndex+y] = cNumber[y];
if(y == (int)(strlen(cNumber)-1))
{
cIndex += y;
}
}
if(x != cLine)
{
cIndex +=2;
}
}
//Add CRLF, and set cIndex accordingly.
strcat(cPointer, "\r\n");
cLine++;
//cIndex = (cLine * Dashes)+(2 * cLine);
cIndex = strlen(cPointer);
}while(cLine != (Lines));
ZeroMemory(cNumber, 3);
free(cNumber);
*CharStuff = cPointer;
return;
}