Recent content by darwinharianto

yeah i am new to C just a project for my test

ahh, yes thank you so much

maybe you get me wrong, i mean i want to display X1 X2, ... Xn not the full matrix so the results will be like X1 = ... X2 = ... X3 = ... X4 = ... for 4x4 matrix

okay i have done it all, but i can't display them at the end of the code i use this for(i=0; i<n+1; i++) printf("\n X[i] = %f",x[i]); how can i make it display x1, x2 ... xn ?

yes sorry about that i forgot it go n-1 thanks

so it is better if i scanf the "n" and put it into a loop if so my loop will be like this? for (i=0; i<=n; i++) for (j=0; j<=n; j++) scanf("%f";&A[j][I]); for my input?

yes i need the scanf because i have to input numbers on the matrix thank you when i removed the "/n" it does solve the problem

Homework Statement #include <stdio.h> #include <stdlib.h> #include <math.h> int main() { int i,j,k,n; float A[3][4]; float x[3],c,sum=0; n=2; printf("first row\n"); scanf("%f",&A[0][0]); scanf("%f",&A[0][1]); scanf("%f\n",&A[0][2]); printf("second row\n")...

okay now i understand about the frequencies thank you

thanks psparky now I understand why they are using 3 phase but for the frequency i still get confused. So I can conclude that by history people were using low frequencies, but then they changed the frequency to 50 Hz or 60 Hz then all the equipment were adjusted to be used at 50 or 60 Hz, but is...

Homework Statement why are there only 3 phase systems and 1 phase system, not other systems like 4 phase or more? why do electricity only use 50/60 Hz? Homework EquationsThe Attempt at a Solution for number 1 i assume if there are more phase, the price will be higher so it won't be used. But i...

ooh, so the equation go like this? I(s)=250/s(s+50) I(s)=5/s - 5/(s+50) I(t)=5 - 5 e^ -50 t then because t=0 then I(0) = 5-5 = 0 so because it haven't been started so the current would be 0 okay, thanks

Homework Statement I have a circuit with resistor and inductor (RL) that is placed serial and a power supply. the voltage is constant 50 V at t=0 , R=10 ohm, and L=0.2 H. Find the I using laplace transformation Homework Equations - The Attempt at a Solution my attempt is transform everything...

oh now i understand at top i wrote x1[0] so i can't make x1[0][1] thanks i wrote another one and made a wrong deduction thanks

what is second index? i tried to display d and i got the same result i think the problem comes from the forward substitution to find d is there anything wrong in the debugging to find d? thank you for the reply