How do you write a c plus plus program that computes the sum mean and standard deviation of 50 numbers?

Answer 1

Assuming the image is an RGB image, sum the red, green and blue components of the pixels separately then divide each by the number of pixels. E.g., given two pixels RGB(a, b, c) and RGB(x, y, z) the mean is RGB ((a+x)/2, (b+y)/2, (c+z)/2).

Answer 2

#include

#include

#include

#include

using namespace std;

int input_number( unsigned index )

{

string input = "", nth = "";

int number = 0;

switch(index%10)

{

case(1): nth="st"; break;

case(2): nth="nd"; break;

case(3): nth="rd"; break;

default: nth="th";

}

while( true )

{

cout<<"Please enter the "<

getline( cin, input );

stringstream ss( input );

if( ss >> number )

break;

cout<<"Invalid number, please try again"<

}

return( number );

}

int main()

{

unsigned index=0, max_numbers=50;

int mean=0, sd=0;

__int64 sum=0;

vector number;

cout<<"Enter "<

while( index

number.push_back( input_number( ++index ));

cout<<"\nSet of numbers: ";

for(index=0; index

{

sum += number[index];

cout<

}

cout<<'\n'<

mean = sum / number.size();

for(index=0; index

sd += (number[index]-mean) * (number[index]-mean);

sd /= number.size();

sd = (int) sqrt((double) sd);

cout<<"Sum: "<

cout<<"Mean: "<

cout<<"SD: "<

cout<

}

Example Output

Enter 50 numbers

Please enter the 1st number: 42

Please enter the 2nd number: 54

Please enter the 3rd number: 62

Please enter the 4th number: 89

Please enter the 5th number: 87

Please enter the 6th number: 95

Please enter the 7th number: 12

Please enter the 8th number: 15

Please enter the 9th number: 65

Please enter the 10th number: 984

Please enter the 11st number: 123

Please enter the 12nd number: 84

Please enter the 13rd number: 6

Please enter the 14th number: 65

Please enter the 15th number: 54651

Please enter the 16th number: 65

Please enter the 17th number: 9

Please enter the 18th number: 9

Please enter the 19th number: 9898

Please enter the 20th number: 454

Please enter the 21st number: 21

Please enter the 22nd number: 56

Please enter the 23rd number: 5665

Please enter the 24th number: 45

Please enter the 25th number: 7

Please enter the 26th number: 54

Please enter the 27th number: 25

Please enter the 28th number: 7

Please enter the 29th number: 6782

Please enter the 30th number: 981

Please enter the 31st number: 6514

Please enter the 32nd number: 213654

Please enter the 33rd number: 45

Please enter the 34th number: 984

Please enter the 35th number: 564

Please enter the 36th number: 1

Please enter the 37th number: 6

Please enter the 38th number: 4654

Please enter the 39th number: 49

Please enter the 40th number: 61

Please enter the 41st number: 321

Please enter the 42nd number: 951

Please enter the 43rd number: 324

Please enter the 44th number: 8

Please enter the 45th number: 98

Please enter the 46th number: 951

Please enter the 47th number: 65

Please enter the 48th number: 65

Please enter the 49th number: 54

Please enter the 50th number: 6

Set of numbers: 42 54 62 89 87 95 12 15 65 984 123 84 6 65 54651 65 9 9 9898 454 21 56 5665 45 7 54 25 7 6782 981 6514 213654 45 984 564 1 6 4654 49 61 321 951 324 8 98 951 65 65 54 6

Sum: 309887

Mean: 6197

SD: 8955

Answer 3

to calculate standard deviation using pointers