write a C ++ program to Create a 2-dimensional array with 4 rows and 30 columns.

Question

write a C ++ program to Create a 2-dimensional array with 4 rows and 30 columns. Row represents sections of a course

and column represents the students, value inside each position of the array is the Final exam

grade for each students. Fill the array with random numbers between 40 and 100. Calculate the

total, average, maximum, minimum for each section.

1.5. Generate a histogram for all the grades. Each score represents one dot on the histogram. To do

that, first create an array of size 61 and then stores the count of each scores in the array . Once you have all the count, output the number of dots for each score based on the count.

plz compile before posting it , if u got correct answer then post the answer otherwise i do need the wrong code b/c somebody already post the wrong code and that's why i resubmit this question.

Explanation / Answer

#include <iostream>

#include <stdlib.h>

using namespace std;

int main()

{

int cls[4][30];

int sectionMax[4],sectionMin[4],sectionTotal[4],sectionHistogram[4][61];

float sectionAvg[4];

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

for(int j=0;j<30;j++)

cls[i][j] = rand()a + 40;

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

for(int j=0;j<61;j++)

sectionHistogram[i][j] = 0;

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

{

int max=0,min=101,total=0;

for(int j=0;j<30;j++)

{

total += cls[i][j];

if(cls[i][j]>max)

max = cls[i][j];

if(cls[i][j]<min)

min = cls[i][j];

sectionHistogram[i][cls[i][j]-40]++;

}

sectionTotal[i] = total;

sectionMin[i] = min;

sectionMax[i] = max;

sectionAvg[i] = total*1.0/30;

}

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

{

cout<<"Performance of section :"<<i+1<<endl;

cout<<"Total marks = "<<sectionTotal[i]<<endl;

cout<<"Highest marks = "<<sectionMax[i]<<endl;

cout<<"Lowest marks = "<<sectionMin[i]<<endl;

cout<<"Average marks = "<<sectionAvg[i]<<endl;

cout<<endl<<endl;

}

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

{

cout<<"Histogram for section :"<<i+1<<endl;

cout<<"Marks Students"<<endl;

for (int j = 0; j < 61; j++)

{

cout<<j+40<<' '<<sectionHistogram[i][j]<<endl;

}

cout<<endl<<endl;

}

}

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