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2 years ago

Create a 4x5 matrix with ones everywhere and zeros on the last row.

Computers and Technology

1 answer:

Stells [14]2 years ago

7 0

Answer:

#include <iostream>

using namespace std;

int main() {

int a[4][5];//declaring a matrix of 4 rows and 5 columns.

for(int i=0;i<4;i++)

{

for(int j=0;j<5;j++)

{

if(i==3)//initializing last row as 0.

{

a[i][j]=0;

}

else//initializing last row as 1.

{

a[i][j]=1;

}

for(int i=0;i<4;i++)

{

for(int j=0;j<5;j++)

cout<<a[i][j]<<" ";//printing the matrix.

cout<<endl;

}

return 0;

}

Output:-

1 1 1 1 1

0 0 0 0 0

Explanation:

I have created a matrix of size 4 rows and 5 columns.I have used for loops to fill the array.To fill the last row with 0 i have used if statement.else we are filling it with 1.

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Explanation:

I will explain the program line by line.

First SomePlayers.txt is opened in r mode which is read mode using open() method. fileobj is the name of the file object created to access or manipulate the SomePlayers.txt file. Next a for loop is used to move through each string in the text file and rstrip() method is used to remove white spaces from the text file and stores the names in player_names. Next the file is closed using close() method. Next vowels holds the list of characters which are vowels including both the upper and lower case vowels.

player_names=[name for name in player_names

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This is the main line of the code. The for loop traverses through every name string in the text file SomePlayers.txt which was first stored in player_names when rstrip() method was used. Now the IF condition checks the first character of each name string. [0] is the index position of the first character of each players name. So the if condition checks if the first character of the name is a vowel or not. in keyword is used here to check if the vowel is included in the first character of every name in the file. This will separate all the names that begins with a vowel and stores in the list player_names. At the end the print statement print(player_names) displays all the names included in the player_names which begin with a vowel hence removing all those names do not begin with a vowel.

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