Write a c program that would read inputs that correspond to the marks scored by each student in a class for a Test.

Question

Write a c program that would read inputs that correspond to the marks scored by each student in a class for a Test. The input for the problem would be the first value should state the number of students in the class and the subsequent inputs will be the marks for each of the student in the class. The marks are entered in order of the student number. Meaning the first mark entered is for student #1,second mark for student #2 and so on. For array declaration purposes, the number of students in the class would never be more than 60. Your program should read and save the inputs in an array first. Then it should process the array to calculate the mean average value for the test, the higher scorer for the test and the student number that correspond to the scores. Your program should contain at least 2 other functions, MEAN and TOPSCORER. Function MEAN should accept the array of the marks as the parameter and anything else you feel relevant and return the mean value. Function TOPSCORER should also have the same parameter list but need not return any value. It will find and print the necessary high score and scorer from the function itself. You may calculate the percentage of students who scored above mean value in the main program.

Answer 1

#include <stdio.h>

#include <string.h>

typedef struct _TScoreRec

{

int studentNum;

double score;

} *TScoreRec;

#define SCORE_REC_SIZE (sizeof(struct _TScoreRec))

#define MAX_NUM_SCORES (60)

typedef struct _TScoreStats

{

int n;

double meanAvg;

struct _TScoreRec maxScore;

struct _TScoreRec minScore;

} * TScoreStats;

#define SCORE_STATS_SIZE (sizeof(struct _TScoreStats))

/**********************************************************

PASS #1: calculates the total,

meanAvg,

min and max

***************************************************/

int inputScores(TScoreRec A, TScoreStats scoreStats)

{

memset(A,0,SCORE_REC_SIZE*MAX_NUM_SCORES);

//inputs the # of scores

int N=-1;

while (N<0)

{

printf(" How many student scores ???? :>");

scanf("%d",&N);

}

if (N>1)

{

if (N>MAX_NUM_SCORES)

{

N=MAX_NUM_SCORES;

}

scoreStats->n = N;

double maxScore = -1;

double minScore = 99999;

double grandTotalSum=0;

double dblScoreVal;

int iIndexPosMin=-1, iIndexPosMax=-1;

int iLoop=0;

for (iLoop=0; iLoop<N; iLoop++)

{

dblScoreVal = -1;

while (dblScoreVal<0)

{

printf(" Please input the score for student # %d :> ",(iLoop+1));

scanf("%lf",&dblScoreVal);

}

A[iLoop].score = dblScoreVal;

A[iLoop].studentNum = iLoop;

if (dblScoreVal<minScore)

{

iIndexPosMin=iLoop;

minScore = dblScoreVal;

}

if (dblScoreVal>maxScore)

{

iIndexPosMax = iLoop;

maxScore = dblScoreVal;

}

grandTotalSum += dblScoreVal;

} //for loop

scoreStats->n = N;

scoreStats->meanAvg = grandTotalSum/N;

scoreStats->minScore.studentNum = iIndexPosMin;

scoreStats->minScore.score = minScore;

scoreStats->maxScore.studentNum = iIndexPosMax;

scoreStats->maxScore.score = maxScore;

} //N>1

return(N);

}

/*********************************************************

PASS #2: calculates the percent of students who

scored above the meanAvg, as it outputs;

then reports the meanAvg, min, and max

*********************************************************/

void OutputScores(TScoreRec A, TScoreStats scoreStats)

{

int N = scoreStats->n;

int hitCount=0;

int iLoop=0;

double grandTotalSum=0;

printf("****************************************************************************************************\n");

printf(" student rec # score \n");

for (iLoop=0; iLoop<N; iLoop++)

{

printf(" %d %12.6lf \n", A[iLoop].studentNum+1, A[iLoop].score);

grandTotalSum += A[iLoop].score;

if (

(A[iLoop].score) >= (scoreStats->meanAvg)

)

{

hitCount++;

}

}

printf("****************************************************************************************************\n");

printf(" TOTAL: %12.6lf \n",grandTotalSum);

printf(" Mean Avg = %12.6lf \n",scoreStats->meanAvg);

printf(" Min Score is student # %d with a score of %12.6lf \n",scoreStats->minScore.studentNum+1,scoreStats->minScore.score);

printf(" Max Score is student # %d with a score of %12.6lf \n",scoreStats->maxScore.studentNum+1,scoreStats->maxScore.score);

printf(" Percent of Students scoring above MeanAvg : %12.6lf %%\n", hitCount*100.0f/N);

printf("******************************************************************************************************\n");

}

int Go()

{

struct _TScoreRec A[MAX_NUM_SCORES];

struct _TScoreStats scoreStats;

int n = inputScores(A,&scoreStats);

if (n>1)

{

OutputScores(A,&scoreStats);

}

return 0;

}

int main()

{

return(Go());

}