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![How to declare an array?
Data type array name [size];
int array[4];
Initialize array
int array [3] = {3, 4,5};
int array[3] ;
array[0] = 3;
array[1] = 4;
array[2] =5;
Accessing array
For loop](https://image.slidesharecdn.com/2darray-250917170516-a138888e/85/Array_C-_programming_example_and-reviews2-6-320.jpg)
![1. for(i=0;i<n;i++) {
2. for(j=i+1;j<n;j++) {
3. if(arr[i]>arr[j]) {
4. temp =arr[i];
5. arr[i]=arr[j];
6. arr[j]=temp;
7. }
8. }
9. }
1. int size = 5;
2. int array[size] = {4, 5, 1, 3, 9};
3. temp=0; int i=0;
4. int j=size- 1;
5. while( i < j){
6. temp = array[i];
7. array[i] = array[j];
8. array[j] = temp; i++;
9. j--;
10. }
Sort ascending order
1. for(i=0;i<n;i++) {
2. for(j=i+1;j<n;j++) {
3. if(arr[i]<arr[j]) {
4. temp =arr[i];
5. arr[i]=arr[j];
6. arr[j]=temp;
7. }
8. }
9. }
Sort descending order
Reverse array](https://image.slidesharecdn.com/2darray-250917170516-a138888e/85/Array_C-_programming_example_and-reviews2-7-320.jpg)
![Multi-
dementional
Array
• How to initialize a 2D
array?
Data type array_name
[row][col]
int 2Darray [3][3]
Input data: same as 1D array](https://image.slidesharecdn.com/2darray-250917170516-a138888e/85/Array_C-_programming_example_and-reviews2-8-320.jpg)
![Practice
what is the value of sum after this code executes?
1. int[][] matrix = {{1,1,2,2},{1,2,2,4},{1,2,3,4},{1,4,1,2}};
2. int sum = 0;
3. int col = matrix[0].length - 2;
4. for (int row = 0; row < 4; row++) {
5. sum = sum + matrix[row][col];
6. }](https://image.slidesharecdn.com/2darray-250917170516-a138888e/85/Array_C-_programming_example_and-reviews2-10-320.jpg)
![How to declare an array?
Data type array name [size];
int array[4];
Initialize array
int array [3] = {3, 4,5};
int array[3] ;
array[0] = 3;
array[1] = 4;
array[2] =5;
Accessing array
For loop](https://image.slidesharecdn.com/2darray-250917170516-a138888e/75/Array_C-_programming_example_and-reviews2-6-2048.jpg)
![1. for(i=0;i<n;i++) {
2. for(j=i+1;j<n;j++) {
3. if(arr[i]>arr[j]) {
4. temp =arr[i];
5. arr[i]=arr[j];
6. arr[j]=temp;
7. }
8. }
9. }
1. int size = 5;
2. int array[size] = {4, 5, 1, 3, 9};
3. temp=0; int i=0;
4. int j=size- 1;
5. while( i < j){
6. temp = array[i];
7. array[i] = array[j];
8. array[j] = temp; i++;
9. j--;
10. }
Sort ascending order
1. for(i=0;i<n;i++) {
2. for(j=i+1;j<n;j++) {
3. if(arr[i]<arr[j]) {
4. temp =arr[i];
5. arr[i]=arr[j];
6. arr[j]=temp;
7. }
8. }
9. }
Sort descending order
Reverse array](https://image.slidesharecdn.com/2darray-250917170516-a138888e/75/Array_C-_programming_example_and-reviews2-7-2048.jpg)
![Multi-
dementional
Array
• How to initialize a 2D
array?
Data type array_name
[row][col]
int 2Darray [3][3]
Input data: same as 1D array](https://image.slidesharecdn.com/2darray-250917170516-a138888e/75/Array_C-_programming_example_and-reviews2-8-2048.jpg)
![Practice
what is the value of sum after this code executes?
1. int[][] matrix = {{1,1,2,2},{1,2,2,4},{1,2,3,4},{1,4,1,2}};
2. int sum = 0;
3. int col = matrix[0].length - 2;
4. for (int row = 0; row < 4; row++) {
5. sum = sum + matrix[row][col];
6. }](https://image.slidesharecdn.com/2darray-250917170516-a138888e/75/Array_C-_programming_example_and-reviews2-10-2048.jpg)
Array_C++_programming_example_and reviews2
- 1.
- 2. Ice Breaker Food Would YouRather What's your bucket list?
- 3. Agenda Array: • Definition& Example • Sorting array 2D-Array: • Definition & Example • Practice
- 4. What is array?Its example in real life? Array is an indexed sequence of elements, all the same type.
- 5. Example of array, multi-array: •Book pages • A dozen of eggs • An excel sheet
- 6. How to declarean array? Data type array name [size]; int array[4]; Initialize array int array [3] = {3, 4,5}; int array[3] ; array[0] = 3; array[1] = 4; array[2] =5; Accessing array For loop
- 7. 1. for(i=0;i<n;i++) { 2.for(j=i+1;j<n;j++) { 3. if(arr[i]>arr[j]) { 4. temp =arr[i]; 5. arr[i]=arr[j]; 6. arr[j]=temp; 7. } 8. } 9. } 1. int size = 5; 2. int array[size] = {4, 5, 1, 3, 9}; 3. temp=0; int i=0; 4. int j=size- 1; 5. while( i < j){ 6. temp = array[i]; 7. array[i] = array[j]; 8. array[j] = temp; i++; 9. j--; 10. } Sort ascending order 1. for(i=0;i<n;i++) { 2. for(j=i+1;j<n;j++) { 3. if(arr[i]<arr[j]) { 4. temp =arr[i]; 5. arr[i]=arr[j]; 6. arr[j]=temp; 7. } 8. } 9. } Sort descending order Reverse array
- 8. Multi- dementional Array • How toinitialize a 2D array? Data type array_name [row][col] int 2Darray [3][3] Input data: same as 1D array
- 9.
- 10. Practice what is thevalue of sum after this code executes? 1. int[][] matrix = {{1,1,2,2},{1,2,2,4},{1,2,3,4},{1,4,1,2}}; 2. int sum = 0; 3. int col = matrix[0].length - 2; 4. for (int row = 0; row < 4; row++) { 5. sum = sum + matrix[row][col]; 6. }
- 11. Ice breaker • What'san "old person" thing that you do?
- 12. Agenda - Watch videoof passing array as parameter in Function - Review function definition and its example - Practice problem
- 13.
- 14. Passing Array asParameter in Function
- 15. C++ Function Declaration returnTypefunctionName (parameter1, parameter2,...) { // function body } // function declaration void greet() { cout << "Hello World"; }
- 16. Example 1. #include <iostream> 2.using namespace std; 3. int addition (int a, int b) { 4. int r; 5. r=a+b; 6. return r; 7. } 8. int main () { 9. int z; 10. z = addition (5,3); 11. cout << "The result is " << z; 12. }
- 17. Practices • Write aprogram that calculates 6^5. Declare your own function to do this.
- 18. Practices Write a programwith function to find 3 largest number of an array. Array size: 8 Input: {7, 12, 9, 15, 19, 32, 56, 70}