Question

Tracing through a program :D
int maximum(int fdata[], int n)
{
int i, fmax;
fmax = fdata[0];
for (i=0; i fmax) fmax = fdata[i]; return(fmax); } int main() { int data[100], i, max; for (i=0; i<100; i++) data[i] = rand() % 100; max = maximum(data,100); printf("Max = %d\n", max); return 0; }

Answer 1

So first we assume that we have #include<stdio.h> and so forth otherwise this program woudn't even compile because the computer wouldn't be able to detect some of the syntaxes that are included in stdio.h being used in this program.

Answer 2

okay so what are you trying to do here, just get a max value out of the 100 random number list

Answer 3

Well I'm trying to trace through the program step by step to see the outcome.

Answer 4

okay so u want to add stuff in that displays address spaces in here now?

Answer 5

We start in int main function where we have integer data invoking an array of 100 numbers, integer i and integer max.

Answer 6

No, we just explain how the program begins and starts going through every step until it reaches the outcome.

Answer 7

oh okay

Answer 8

int main()
{
int data[100], i, max;
for (i=0; i<100; i++)
data[i] = rand() % 100;
max = maximum(data,100);
printf("Max = %d\n", max);
return 0;
}
we start here

Answer 9

-generate 100 random number and stored in list
-feed the list into the other max finding function
-and returns the max

Answer 10

i wonder if you can avoid passing in the 100 though, isnt htere some length of array function in C

Answer 11

int maximum(int fdata[], int n)
{
int i, fmax;
fmax = fdata[0];
for (i=0; i<n; i++)
if (fdata[i] > fmax)
fmax = fdata[i];
return(fmax);
}
int main()
{
int data[100], i, max;
for (i=0; i<100; i++)
data[i] = rand() % 100;
max = maximum(data,100);
printf("Max = %d\n", max);
return 0;
}

Answer 12

what do you mean passing in the 100?

Answer 13

this line
max = maximum(data,100); <---

Answer 14

oh that is just calling out the function. I don't know how it would affect it.

Answer 15

int maximum(int fdata[]) <---- get rid of the extra parameter
int n
n=length(fdata[])
{
int i, fmax;
fmax = fdata[0];
for (i=0; i<n; i++)
if (fdata[i] > fmax)
fmax = fdata[i];
return(fmax);
}

Answer 16

oh nvm we do need the 100

Answer 17

int main(k) <--- now u can work with varying list sizes
{
int data[k], i, max;
for (i=0; i<k; i++)
data[i] = rand() % 100;
max = maximum(data);
printf("Max = %d\n", max);
return 0;
}

Answer 18

i guess it shud say int k

Answer 19

int maximum(int fdata[], int n) <--- int n becomes 100 on
{
int i, fmax;
fmax = fdata[0];
for (i=0; i<n; i++) <--- here, n becomes 100
if (fdata[i] > fmax)
fmax = fdata[i];
return(fmax);
}

Answer 20

yeah theres no need for that mat

Answer 21

oh to be honest they haven't taught me to put anything inside the int main() parenthesis other than void

Answer 22

so I just know the long way

Answer 23

okay wait

Answer 24

lemme see if i got a c compiler somewhere

Answer 25

okay so is this just "C" or "C++"

Answer 26

C

Answer 27

I'm confused on the maximum function
int maximum(int fdata[], int n)
{
int i, fmax;
fmax = fdata[0];
for (i=0; i<n; i++)
if (fdata[i] > fmax)
fmax = fdata[i];
return(fmax);
}
how is fdata working without a value? (I mean as calling it int fdata[0] in the second function since on the first it doesn't exist.

Answer 28

hey try this code out see if its working

Answer 29

#include <stdio.h>

int maximum(int fdata[])
{
int n =sizeof(fdata);
int i, fmax;
fmax = fdata[0];
for (i=0; i<n; i++)
if (fdata[i] > fmax)
fmax = fdata[i];
return(fmax);
}
int main()

{
int k=100;
int data[k], i, max;
for (i=0; i<k; i++)
data[i] = rand() % 100;
max = maximum(data);
printf("Max = %d\n", max);
return 0;
}

Answer 30

I know
max = maximum(data,100);
sends data(the 100 random numbers), and 100 for n. So on
int maximum (int fdata[], int n) <-- data becomes fdata[] and int n becomes 100.
so in fmax = fdata[0] <--- meaning that there is an array of 1 number. . im lost

Answer 31

what do u mean we are putting in a value into fdata

Answer 32

practic.c:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
practic.c: In function 'main':
practic.c:21: warning: incompatible implicit declaration of built-in function 'printf'

Answer 33

the compiler can't run it.

Answer 34

oh I want to know from where fdata comes from.

Answer 35

since is not called out in neither of the functions.

Answer 36

fadata is just the name of a variable

Answer 37

you are inputing it in
max = maximum(data,100);

Answer 38

fdata and data share the same address space

Answer 39

don't you need to create a variable first before you can call it?

Answer 40

oh ok so if I wanted I could of put tacos instead of fdata

Answer 41

u can do that

Answer 42

alright

Answer 43

and btw your program game an error on the main function

Answer 44

ya i dunno its working fine on this compiler

Answer 45

http://www.tutorialspoint.com/compile_c_online.php
you can test out code there too

Answer 46

i dont have eclipse and that stuff so

Answer 47

ooo

Answer 48

I don't recall being able to use sizeof()

Answer 49

that makes things easier although both are the same thing so np

Answer 50

int maximum(int fdata[], int n)
{
int i, fmax;
fmax = fdata[0];
for (i=0; i<n; i++)
if (fdata[i] > fmax)
fmax = fdata[i];
return(fmax);
}
int main()
{
int data[100], i, max;
for (i=0; i<100; i++)
data[i] = rand() % 100;
max = maximum(data,100);
printf("Max = %d\n", max);
return 0;
}

Answer 51

fmax = fdata[0];
for (i=0; i<n; i++)
if (fdata[i] > fmax)
fmax = fdata[i];
what is really happening there?

Answer 52

fmax = fdata[0] which fdata is 1 number. so fmax = 0 right?

Answer 53

for (i=0; i<n; i++)
if (fdata[i] > fmax)
then a loop of 100 is created and an if statement happens where (fdata[i] <-- i being 100 so we have an array of 100... > fmax <-- fmax being = 0. ??

Answer 54

so if ( array of 100 random numbers from data is greater than 0?

Answer 55

fdata[i] gives u the ith indexed value in that list

Answer 56

it checks every place in the list

Answer 57

so it checks every single random number created to see if its greater than fmax