I have to write a program in C which, prints numbers from collatz as a triangle.
Like this:
I have tried and
This is my output:
This is my code:
int inputLines, startNum, number;
printf("Lines: ");
scanf("%d",& inputLines);
printf("Start: ");
scanf("%d",& startNum);
for(int i = 0; i < inputLines; i++){
printf("\n");
for(int j = 0; j <= i; j++){
printf("%d ", startNum);
if(startNum % 2 == 0){
startNum = startNum / 2;
}else{
startNum = startNum * 3 + 1;
}
}
}
#include <stdio.h>
int main(void) {
int inputLines = 4;
int start = 19;
for(int i = 0; i < inputLines; i++)
{
int n = start;
for(int j=0; j<i+1; ++j)
{
printf("%d ", n);
n = (n%2)? 3*n+1 : n/2;
}
printf("\n");
}
return 0;
}
Related
Everythings right except the output of the last part, I'm supposed to get this output https://i.stack.imgur.com/PRJMT.png but instead it got this https://i.stack.imgur.com/iZflq.png
Also heres my code:
#include <stdio.h>
int main() {
int n;
printf("Enter the number of goal-scorers: ");
scanf("%d", &n);
int ar[n];
for(int i=0; i<n; i++){
printf("Score of player #%d: ", i+1);
scanf("%d", &ar[i]);
}
for(int i=0; i<n; i++){
for(int j=i+1; j<n; j++){
if(ar[i] <ar[j]){
int temp = ar[j];
ar[j] = ar[i];
ar[i]; temp;
}
}
}
printf("\nHighest to lowest:\n");
for(int i=0; i<n; i++)
printf("Player #%d: %d\n",i+1, ar[i]);
return;
}
Found it!
ar[i]; temp;
But you want ar[i] = temp;
You enabled compiler warnings. What I don't get is why the warning for "statement has no effect" is not showing up.
The possible solution may be like :
#include <stdio.h>
struct player {
int no;
int score;
};
int main() {
int n;
printf("Enter the number of goal-scorers: ");
fflush(stdout);
scanf("%d", &n);
if (n <= 0)
return 0 ;
struct player players[n];
for (int i = 0 ; i < n ; i++) {
players[i].no = 1 + i;
printf("Score of player #%d: ", players[i].no);
fflush(stdout);
scanf("%d", &players[i].score);
}
for (int i = 0 ; i < n ; i++) {
for (int j = i + 1 ; j < n ; j++) {
if (players[i].score < players[j].score) {
struct player temp = players[j];
players[j] = players[i];
players[i] = temp;
}
}
}
printf("\nHighest to lowest:\n");
for (int i = 0 ; i < n ; i++)
printf("Player #%d: %d\n", players[i].no, players[i].score);
return 0;
}
I'm asked to find the highest frequency from an array of elements and all elements with said frequency. My code seem to work just fine but it seems to have a mistake somewhere when i submit it. Can anyone help me find the error?
Format Input:
The first line contains an integer T stating the number of test cases. For each test case, the first line contains a single integer N which indicate the number of element in the array. The next line contains N integers Xi (1≤i≤N) which indicate ith element in the array.
Format Output:
Consists of T lines where each line has the format “Case #X: Y ”, where X is the test case number starting at 1 and Y is the highest frequency. Next line contains all elements which have that frequency sorted in ascending order.
Constraints:
1 ≤ T ≤ 20 | 2 ≤ N ≤ 20.000 | 1 ≤ Xi ≤ 2 × 10^5
Sample Input:
3
8
1 1 2 2 3 4 5 5
8
5 5 4 3 2 2 1 1
4
1 1 1 3
Sample Output:
Case #1: 2
1 2 5
Case #2: 2
1 2 5
Case #3: 3
1
Here is my code:
#include <stdio.h>
int main() {
int T, N[20];
scanf("%d", &T); getchar();
int A[T][20000];
for (int i = 0; i<T; i++) {
scanf("%d", &N[i]); getchar();
for (int j = 0; j<N[i]; j++) {
scanf("%d", &A[i][j]); getchar();
}
int X = 0;
for (int j = 0; j<N[i]; j++) {
for (int k = j + 1; k<N[i]; k++) {
if (A[i][k]<A[i][j]) {
X = A[i][j];
A[i][j] = A[i][k];
A[i][k] = X;
}
}
}
}
int f[20000];
for (int i = 0; i<T; i++) {
int c = 0, mc = 0;
for (int j = 0; j<N[i]; j++) {
c = 1;
if(A[i][j] != -1) {
for (int k = j+1; k<N[i]; k++) {
if (A[i][j] == A[i][k]) {
c++;
A[i][k] = -1;
}
}
f[j]=c;
}
if (c>mc) {
mc = c;
}
}
printf("Case #%d: %d\n", i+1, mc);
for (int j = 0; j<N[i]; j++) {
if (A[i][j] != -1) {
if (f[j] == mc) {
printf ("%d", A[i][j]);
if (j<N[i]-1) {
printf(" ");
}
}
}
}
printf("\n");
}
return 0;
}
EDIT
So I made another code where instead of inputting all arrays at once and outputting everything at once, this code outputs the frequency and elements after i input the first arrays of numbers. But it seems like the code still have problems and i can't find where... P.s I'm pretty new to this, so i apologise for the lack of efficiency of my codes.
NEW CODE
#include <stdio.h>
int main() {
int T, N;
scanf("%d", &T); getchar();
int A[20000];
for (int i = 0; i<T; i++) {
scanf("%d", &N); getchar();
for (int j = 0; j<N; j++) {
scanf("%d", &A[j]); getchar();
}
int X;
for (int j = 0; j<N; j++) {
for (int k = j + 1; k<N; k++) {
if (A[k]<A[j]) {
X = A[j];
A[j] = A[k];
A[k] = X;
}
}
}
int f[N], c = 0, mc = 0;
for (int j = 0; j<N; j++) {
c = 1;
if(A[j] != -1) {
for (int k = j+1; k<N; k++) {
if (A[j] == A[k]) {
c++;
A[k] = -1;
}
}
f[j]=c;
if (c>mc) {
mc = c;
}
}
}
printf("Case #%d: %d\n", i+1, mc);
for (int j = 0; j<N; j++) {
if (A[j] != -1) {
if (f[j] == mc) {
printf ("%d", A[j]);
if (j<N-1) {
printf(" ");
}
}
}
}
printf("\n");
}
return 0;
}
It took me a couple of days but i finally got how to do this. Apparently, it was not as complicated as i thought... here is the working code. Thanks to everyone who helped :)
#include <stdio.h>
int main() {
int T, N;
scanf("%d", &T);
for (int i = 0; i<T; i++) {
scanf("%d", &N); getchar();
//INPUT elements and counting frequncy for each element
int f[200001] = {0}, E = 0;
for (int j = 0; j<N; j++) {
scanf("%d", &E); getchar();
f[E]++;
}
//find max frequency and how many elements with max frequency
int max = 0, c = 0;
for (int j = 1; j<200001; j++) {
if (f[j] == max) {
c ++;
}
if (f[j]>max) {
max = f[j];
c = 1;
}
}
//OUTPUT result
printf("Case #%d: %d\n", i+1, max);
int counter = 0;
for (int j = 1; j<200001; j++) {
if (f[j] == max) {
counter ++;
if (counter<c){
printf("%d ", j);
} else {
printf("%d\n", j);
}
}
}
}
return 0;
}
I am practicing my C program currently and I want to calculate two 2D matrix.
But I get confused when I use printf() to check these arrays. They break the program.
Code as below:
int matric_multi_main()
{
int m1_row = 0;
int m1_col = 0;
int m2_row = 0;
int m2_col = 0;
int **matric1;
int **matric2;
printf("Please enter Matric 1 row: ");
scanf("%d", &m1_row);
printf("Please enter Matric 1 column: ");
scanf("%d", &m1_col);
printf("Please enter Matric 2 row: ");
scanf("%d", &m2_row);
printf("Please enter Matric 2 column: ");
scanf("%d", &m2_col);
if (m1_col != m2_row)
{
printf("Error matric size!!!\n");
return 0;
}
/* Allovate memory for matric 1 */
matric1 = malloc(m1_row * sizeof(int *));
for (int i = 0; i < m1_row; i++)
{
matric1[i] = malloc(m1_col * sizeof(int));
}
/* Allovate memory for matric 2 */
matric2 = malloc(m2_row * sizeof(int *));
for (int i = 0; i < m2_row; i++)
{
matric2[i] = malloc(m2_col * sizeof(int));
}
/* Init matric 1 */
for (int i = 0; i < m1_row; i++)
{
for (int j = 0; j < m1_col; j++)
{
printf("[%d, %d] = ", i, j);
scanf("%d", matric1+i*m1_row+j);
}
}
/* Init matric 2 */
for (int i = 0; i < m2_row; i++)
{
for (int j = 0; j < m2_col; j++)
{
printf("[%d, %d] = ", i, j);
scanf("%d", matric2+i*m2_row+j);
}
}
for (int i = 0; i < m1_row; i++)
{
printf("[");
for (int j = 0; j < m1_col; j++)
{
//printf("%d ", *(matric1 + i*m1_row + j)); <- correctly
//printf("%d ", &matric1[i][j]); <-- display the data with wrong order
printf("%d ", matric1[j][i]); <- break the program
}
printf("]\n");
}
for (int i = 0; i < m2_row; i++)
{
printf("[");
for (int j = 0; j < m2_col; j++)
{
//printf("%d ", *(matric2 + i*m2_row + j));
printf("%d ", matric2[i][j]);
}
printf("]\n");
}
}
I think I can use matric1[i][j] to get the correct data directly.
But the example on the website always use array[][] directly.
I can understand the different between my program and example.
This program which written in C should remove duplicated elements from 2 input arrays by user, so when I print the second array which is b[z] after removing duplicates, the output is not true as it prints weird number instead of the input number by the user. (the problem in code is determined by comment).
#include <stdio.h>
#include <stdlib.h>
int main()
{
int n, z ;
printf("Enter size of array\n");
scanf("%d", &n);
int a[n];
if(n <= 20) {
for(int i = 0 ; i < n; i++) {
printf("Enter integer \n");
scanf("%d", &a[i]);
}
}
for(int i = 0 ; i < n; i++) {
printf("%d ", a[i]);
}
printf("\nEnter size of the 2nd array\n");
scanf("%d", &z);
int b[z];
if(z <= 20) {
for(int i = 0 ; i < z; i++) {
printf("Enter integer \n");
scanf("%d", &b[z]);
}
}
for(int i = 0 ; i < z; i++) {
printf("%d ", b[z]);
}
for(int i = 0 ; i < n; i++) {
for(int j = i + 1; j < n; j++) {
if(a[i] == a[j]) {
for(int l = j; l < n; l++)
{
a[l] = a[l + 1];
}
n--;
j--;
}
}
}
printf("\nArray1: ");
for(int i = 0; i < n; i++) {
printf("%d ", a[i]);
}
for(int t = 0; t < z; t++) {
for(int u = t + 1; u < z; u++) {
if(b[t] == b[u]) {
for(int l = u; l < z; l++)
{
b[l] = b[l + 1];
}
z--;
u--;
}
}
}
printf("\nArray2: ");
for(int e = 0; e < z; e++) {
printf("%d ", b[e]);
}
return 0;
}
I'm a freshmen student and we have an activity in intro pro.. We were tasked to create a Christmas tree using a loop...
I have my code here:
#include<stdio.h>
int main ()
{
int rows,a,b,space;
clrscr();
printf("Enter a number of rows:");
scanf("%d",&rows);
space=rows-1
for(b=space;b>=1;b--)
{
for(a=rows;a>=1;a--)
space--;
printf("");
for(a=2*(rows-b)-1;a>=1;a--)
printf("*",a);
printf("\n");
space = space-1;
}
getche();
return 0;
}
This code was given to us by our professor... the program runs, but the output is wrong. Can you help me?
when i run this program, the output was like this:
*
***
*****
******
*******
You have to find a pattern. Say you want a tree with n rows. Last row is going to have 2n-1 stars. Row before it will have 2n-3 and so on. To print a row, first you print a number of spaces, then a number of stars. For last row, you print 0 spaces and 2n-1 stars. For row before it, you print 1 space and 2n-3 stars and so on.
for(int i = 0; i < n; i++)
{ for(int j = i + 1; j < n; j++)
printf(" ");
for(int j = 0; j <= 2*i; j++)
printf("*");
if(i < n - 1) puts("");
}
The Code is a little bit to messed up for me, but this should work:
#include<stdio.h>
int main() {
/*Variables*/
int rows, starNumber, spaceNumber;
int rowCount, spaceCount, starCount, treeTrunkCount, treeTrunkSpaceCount;
printf("Enter Rows:\n>");
scanf("%d",&rows);
for(rowCount = 1; rowCount <= rows; rowCount++) {
starNumber = rowCount * 2 - 1;
spaceNumber = rowCount + rows - starNumber;
for(spaceCount = 0; spaceCount < spaceNumber; spaceCount++)
printf(" ");
for(starCount = 0; starCount < starNumber; starCount++)
printf("%c",'*');
printf("\n");
}
for(treeTrunkCount = 0; treeTrunkCount < 3; treeTrunkCount++) {
for(treeTrunkSpaceCount = 0; treeTrunkSpaceCount < (rows * 2 + 1)/2; treeTrunkSpaceCount++)
printf(" ");
printf("%c\n",'*');
}
}
This is the simplest solution to your program..
#include <stdio.h>
int main()
{
int i=-1,j=0,rows;
printf("Enter Rows:\n");
scanf("%d",&rows);
while(j++<rows) // Moving pointer for the first '*'
{
printf(" ");
}
printf("*"); // This prints the first '*'
while(++i<rows)
{
for(j=-2;++j<rows-i;) // This loop will print Spaces before '*' on each row
printf(" ");
for(j=0;++j<2*i;) // This loop will print * on each row
{
printf("*");
}
printf("\n"); // This printf will take you to the next Line
}
}
This is the shortest and simplest solution for your question:
#include<stdio.h>
#include<conio.h>
void main(){
int count;
int i,j;
printf("enter the numbers of line");
scanf("%d",&count);
for(i=1;i<=count;i++){
for(j=1;j<=i;j++){
printf("*");
}
printf("\n");
}
getch();
}
You forgot a space between "".
for(a=rows;a>=1;a--)
space--;
printf("");
should be
for(a=rows;a>=1;a--)
space--;
printf(" ");
#include <stdio.h>
int main() {
int n = 50;
for (int i = 0; i <= n; ++i) {
for (int k = i; k < n; ++k)
printf(" ");
for (int j = 0; j < i; ++j)
printf("*");
for (int j = 1; j < i; ++j)
printf("*");
printf("\n");
}
for (int l = 1; l < n/2; ++l) {
for (int i = 1; i < n; ++i)
printf(" ");
printf("[|]\n");
}
return 0;
}
A simple tree can be made up with for loop, Christmas may need more symbol...
//Linux C program to print a tree
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <string.h>
int pcenter(char *s) {
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
int ct = w.ws_col;
int sl = strlen(s) / 2;
printf("%*s%*s\n", ct / 2 + sl, s, ct / 2 - sl, "");
return 0;
}
int ptree(char s, char t, int l, int r) {
int i;
for (i = 1; i <= l; i++) {
int j = 2 * i - 1;
char *p = malloc(j);
memset(p, s, j);
pcenter(p);
free(p);
}
for (i = 1; i <= r; i++) {
int j = 1;
char *p = malloc(j);
memset(p, t, j);
pcenter(p);
free(p);
}
return 0;
}
int main() {
// system("clear");
ptree('*', '|', 10, 5);
return 0;
}
#include<stdio.h>
main()
{
int n,i, j, space=1;
printf("Enter the number of rows: ");
scanf("%d",&n);
space=n-1;
for(i=1;i<=n;i++)
{
for(j=1;j<=space;j++)
{
printf(" ");
}
space--;
for(j=1;j<=2*i-1;j++)
{
printf("*");
}
printf("\n");
}
for(i=1;i<=n-3;i++)
{
for(j=1;j<=10;j++)
{
printf(" ");
}
for(j=1;j<=1;j++)
{
printf("*");
}
for(j=1;j<=1;j++)
{
printf("*");
}
for(j=1;j<=1;j++)
{
printf("*");
}
printf("\n");
}
}
#include<stdio.h>
int main()
{
int i,j,k,l=1,a,b;
for(i=8;i>=0;i--)
{
for(j=0;j<=i;j++)
{
printf(" ");
}
k=0 ;
while(k<l)
{
printf("*");
k=k+1;
}
l=l+2;
printf("\n");
}
i=8;
for(b=0;b<=3;b++)
{
for(a=0;a<=i-1;a++)
{
printf(" ");
}
printf("***");
printf("\n");
}
}