Question

IW7-3] Write a code which prints the dynamical matrix for a chain of N masses co by springs k to a file. Write it in a way that "jacobi" can read it in: each line contains all the matrix elements in that row. Have the parameters N and k be inputs to the code One approach is to follow the steps: Declare some big matrix, eg dynmatrix[128][128 Fill the entire matrix with zeros (use two nested loops) Set the diagonal entries dynmatrixlili] to 2k (just one loop needed) Set the elements dynmatrix[i] li+1] to -k (just one loop needed) Set the elements dynmatrixji][i-1] to -k (just one loop needed In the last two steps you will need to be careful with the first and last rows!

***** please answer all questions and type it all please, specially the code you create. I really need the help. Thank you so much, if you help by answer all questions, ill give you a good rating! The language used is C

Answer 1

#include <stdio.h>

int main()
{
   int N,k; //declaring N and k
   printf("Enter N: ");
scanf("%d",&N); //taking N value from the user
printf("Enter k: ");
scanf("%d",&k); //taking k value from the user
int dynmatrix[128][128]; //declaring integer matrix

for(int i=0;i<128;i++){
   for(int j=0;j<128;j++){ // Assigning zeroes to all values
       dynmatrix[i][j]=0;
   }
}

for(int i=0;i<128;i++) // diagonal elements= 2k
   dynmatrix[i][i] = 2*k;

for (int i=0; i<127; i++) //here we have to go till 126 index because wew are assigning at i+1
   dynmatrix[i][i+1]= -k;   

for (int i=1; i<128; i++) //here we have start with index 1 because wew are assigning at i-1
   dynmatrix[i][i-1]= -k;

for(int i=0;i<N;i++){   
   for(int j=0;j<N;j++){ //This loop prints NxN matrix with the assigned values
       printf("%4d ", dynmatrix[i][j]);
   }
   printf("\n");
}
return 0;
}

Activities Terminal Mon 13:19 Ink.c.-Sublime Text (UNREGISTERED) File Edit Selection Find View Goto Tools Project Preferences Help tree.py dash.cpp ann, py nk.c #include <stdio.h> aditya@aditya-Inspiron-5521: 3 int main() File Edit View Search Terminal Help (base) aditya@aditya-Inspiron-5521 int N,k; printf("Enter N:"); scanf("%d",&M) ; printf("Enter k ) scanf ("sd",&k); int dynmatrix[128] [128] //declaring N and k /a.out Enter N: 10 /taking N value from the user Enter k: 5 10 //taking k value from the user //declaring integer matrix 9 -5 10 5 00 5 105 θ-510-5 for(int is;i<128;i++){ for(int j 0:j<128;j++) dynmatrix[i]ljl-; 12 θ-510 // Assigning zeroes to all values 13 0-510 5 10 -5 0 -5 1e 5 15 16 17 O -5 10 θθ-510 for(int i-0;1<128;i++) dynmatrix[i][i]- 2*k // diagonal elements- 2k 19 (base) aditya@aditya-Inspiron-5521:-$Џ 20 21 for (int 1-;1<127: i) dynmatrix[i][i+1]- k //here we have to go till 126 index because wew are assigning at 1+1 24 25 //here we have start with index 1 because wew are assigning at i-1 26 dynmatrix[i][i-l]- -k; 28 29 30 31 for(int j#0;j<N ; j++){ printf("4dynmatrix[i][j]); //This Loop prints NXN matrix with the assigned values 32 printf("n") 34 35 36 return ; 37 Line 31, Column 101 Tab Size: 4