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Closed 10 years ago.
I'm trying to initialise all elements of a 3D array "A". The array consists of 2000x100x4 integer elements of the 3D array and is stored in row-major order. Each index at position [i,j,k] in "A" must be initialised with the value i*i*i + j*j*j.
How can I do this using for loops? Any suggestions? Thanks.
for(i=0;i<2000;i++)
for(j=0;j<100;j++)
for(k=0;k<4;k++)
A[i][j][k]= (i*i*i) + (j*j*j);
I hope I understood your question correctly. Or were you looking for something else?
It's not something hard to do:
int A[2000][100][4];
int i,j,k;
for (i=0;<2000;i++)
{
for (j=0;j<100;j++)
{
for (k=0;k<4;k++)
{
A[i][j][k] = i*i*i + j*j*j;
}
}
}
Related
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Closed 9 years ago.
I'm trying to covert an int to char. Is there any way to do that?
For example:
{
int i;
char d;
i = 55;
d = i;
printf("%c\n", d);
}
How do I make d = 55?
If you want to put the number 55 into a string, use sprintf
Indeed your example can do what you want.
If you really want to place safe, you may:
d = (char) i;
Try this code segment:
printf("%d\n", d);
char are presented in the memory as binary format wich is equivalent to a number and this number is called a code ascii. when you print the code ascii with "%c" Then it will print the charchter equivalent to this code ascii
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Closed 9 years ago.
I have to write a program in c language and this is the code : The problem is that when I try to compile it it says : syntax error before return .Where is my error?
#include <stdio.h>
int main (void)
{
char i,c2,j;
int c=4;
i=j=3;
while (++i <=c)
{
int j=1;
printf("\n Nr1=%c Nr2=%d",64+i,c2);
} do;
return 1;
}
Remove the do from your code. Just while (++i <= c) { /* ... */ };
You are redeclaring j inside the while loop. Remove int j=1;
and remove the do; at the end of your while
There is no such thing as while ... do loop in C. There are while loops or do ... while loops.
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Closed 9 years ago.
i am trying to compare array elements and idea is to collect all dissimilar element to other temp[] array. I think it is going somewhere wrong ...unable to understand...please help me
#include <stdio.h>
#include <stdlib.h>
#define SIZE 30
int my_arr[SIZE] = {10,20,45,63,89,20,15,12,89,24,12,10,89,25,64,39,37,64,95,
27,23,58,97,23,18,56,94,76,32,11
};
int main()
{
int i,j,temp_arr[100];
for(i=0;i<SIZE;i++)
{
for(j=0+i; j<SIZE; j++)
{
if(*(my_arr+i)!=*(my_arr+j))
*(my_arr+i) = temp_arr[i];
}
}
return 0;
}
Here:
*(my_arr+i) = temp_arr[i];
temp_arr[j] is not initialized and you are assigning it to my_arr[i]. You description sounds like you want:
temp_arr[i] = *(my_arr+i);
But then you will end up having holes in the temp_arr. So perhaps you need another index for counting items in the temp_arr.
Something like:
int tmp_cnt = 0;
for(i=0;i<SIZE;i++) {
for(j=0+i; j<SIZE; j++) {
if(*(my_arr+i)!=*(my_arr+j))
temp_arr[tmp_cnt++] = *(my_arr+i);
}
}
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Closed 10 years ago.
I'm trying to print out an array of 100 lf values into columns of ten. I was planning on inserting a new line whenever I hit the tenth data value in each line, but I'm having trouble with my if statement. "Left operand must be 1-value" is the error I keep running into.
Here's the code as is:
for (x=0; x<100; x++)
{
if (x % 10 = 0)
{
printf("\n");
}
printf("|%-6.2lf|", i[x]);
}
Is there a cleaner way to do this?
The problem is this line:
if (x % 10 = 0)
That should be the double-equals sign:
if (x % 10 == 0)
A common typo.
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Closed 10 years ago.
Ok this is a simple C code but for some unknown reason the program refuse to compile and give segmentation fault 11 Please help me
#include <stdio.h>
typedef struct {
int P_answer[9];
int number;
} BOX;
int main()
{
BOX Matrix[8][8];
int i,j;
int k;
for(i=0;i<9;i++){
for(j=0;j<9;j++){
Matrix[i][j].number=0;
Matrix[i][j].P_answer[0]=1;
Matrix[i][j].P_answer[1]=2;
Matrix[i][j].P_answer[2]=3;
Matrix[i][j].P_answer[3]=4;
Matrix[i][j].P_answer[4]=5;
Matrix[i][j].P_answer[5]=6;
Matrix[i][j].P_answer[6]=7;
Matrix[i][j].P_answer[7]=8;
Matrix[i][j].P_answer[8]=9;
}
}
}
Matrix is an 8-by-8 array; each of your loops goes through 9 iterations.
The indexes of an array go from 0 to (size-1).
In your for-loops you go from 0 to size.
That's the reason of your segmentation fault.