I am making a C plus plus program for a programming class that takes in 5 grades for 7 students averages them gets a letter grade and displays it all in a table How do you set up a table for variables?

Answer 1

The following example sets up a two-dimensional array, initialises it with some pseudo-random data, and then prints the table and the averages.

#include<iostream>

#include<time.h>

int main()

{

const int max_students = 7;

const int max_student_grades = 5;

const int max_grades = 6;

const char grade[max_grades]={'A','B','C','D','E','F'};

srand((unsigned) time(NULL));

// Initialise the array with pseudo-random grades:

int table[max_students][max_student_grades];

for(int student=0; student<max_students; ++student)

{

for(int student_grade=0; student_grade<max_student_grades; ++student_grade)

{

table[student][student_grade] = rand()%max_grades;

}

}

// Print the table and average the results.

int overall=0;

for(int student=0; student<max_students; ++student)

{

int average=0;

std::cout<<"Student #"<<student+1;

for(int student_grade=0; student_grade<max_student_grades; ++student_grade)

{

std::cout<<" Grade #"<<student_grade+1<<": "<<grade[table[student][student_grade]]<<", ";

average+=table[student][student_grade];

}

std::cout<<" Average: "<<grade[average/max_grades]<<std::endl;

overall+=average;

}

std::cout<<"Overall average: "<<grade[overall/max_grades/max_students]<<std::endl;

return(0);

}

Example output:

Student #1 Grade #1: A, Grade #2: E, Grade #3: D, Grade #4: E, Grade #5: F, Average: C

Student #2 Grade #1: E, Grade #2: D, Grade #3: E, Grade #4: E, Grade #5: E, Average: D

Student #3 Grade #1: D, Grade #2: A, Grade #3: D, Grade #4: B, Grade #5: A, Average: B

Student #4 Grade #1: C, Grade #2: B, Grade #3: A, Grade #4: A, Grade #5: B, Average: A

Student #5 Grade #1: E, Grade #2: D, Grade #3: C, Grade #4: F, Grade #5: E, Average: D

Student #6 Grade #1: C, Grade #2: D, Grade #3: A, Grade #4: F, Grade #5: A, Average: B

Student #7 Grade #1: B, Grade #2: D, Grade #3: F, Grade #4: B, Grade #5: C, Average: C

Overall average: C