I was recently given an assignment by one of my professors in which I have to write a piece of code in which it prompts for a salary, years of service, and then based on those two pieces of info it calculates a bonus. I've worked with functions declared as doubles, but this is my first time working with void functions. I'm having trouble understanding how I can get my first function to save the prompted values for years of service and salary and then use those in the next function to calculate the bonus. This is what I currently have:
#include <cstdio>
void GetInput()
{
double salary;
int years_service;
printf("Enter your salary: ");
scanf("%lf", &salary);
printf("How many years have your served for us? ");
scanf("%d", &years_service);
}
void CalcRaise()
{
//I initialized salary and years_service because they would not compile
//otherwise. As expected, it does run but since they are set to 0, the
//bonus will be zero.
double salary = 0;
int years_service = 0;
double bonusA;
double bonusB;
double bonusC;
bonusA = salary * .02;
bonusB = salary * .05;
bonusC = salary * .10;
if ( years_service < 2)
{
printf("Here is your bonus: %lf", bonusA);
}
else if ( years_service > 5 && years_service < 10)
{
printf("Here is your bonus: %lf", bonusB);
}
else
{
printf("Here is your bonus: %lf", bonusC);
}
return;
}
int main()
{
GetInput();
CalcRaise();
return 0;
}
As I mentioned, I'm just having trouble figuring out how to save the values from my first function and use those to calculate the bonus. Any help is appreciated. -Thanks
Make all the variables global, and initialize those variables in the starting stage itself.
#include <stdio.h>
#include <stdlib.h>
double salary = 0;
int years_service = 0;
double bonusA;
double bonusB;
double bonusC;
void GetInput()
{
printf("Enter your salary: ");
scanf("%lf", &salary);
printf("How many years have your served for us? ");
scanf("%d", &years_service);
}
void CalcRaise()
{
bonusA = salary * .02;
bonusB = salary * .05;
bonusC = salary * .10;
if (years_service < 2)
{
printf("Here is your bonus: %lf", bonusA);
}
else if (years_service > 5 && years_service < 10)
{
printf("Here is your bonus: %lf", bonusB);
}
else
{
printf("Here is your bonus: %lf", bonusC);
}
}
int main()
{
GetInput();
CalcRaise();
return 0;
}
Related
Tried running this in C but it keeps saying "function definition is not allowed here" when referring to '{'. This is the full code that im trying to run, its called a "greedy algorithm" so im still learning how to make it. The program is supposed to give you your exact change back then let you know how many coins of which type will be needed.
#include <cs50.h>
#include <math.h>
int main()
{
int len = 4;
double cost;
double pay;
{
//promt user for cost
printf("Enter cost: ");
scanf("%lf", &cost);
//prompt user for pay amount
printf("Enter pay: ");
scanf("%lf", &pay);
double change = pay - cost;
if(pay > cost)
printf("Trasncation complete\nHeres your change: %f\n", change);
else if(pay == cost)
printf("Transaction complete.\n");
else if(pay < cost)
printf("insufficient funds\nStill need: %f", cost - pay);
//greddy algorithm
}
void greedy(double change)
{
int i=o;
double number;
double coin[len] = [0.01, 0.05, 0.10, 0.25];
while(i>len)
{
if(coin[i] <= change)
{
number = change / coin[i];
printf("%f of %f is needed", number, change);
change = change * coin[i];
}
i++
}
}
}
You have to define your greedy() function outside of the main function like so:
#include <cs50.h>
#include <math.h>
int main()
{
int len = 4;
double cost;
double pay;
{
//promt user for cost
printf("Enter cost: ");
scanf("%lf", &cost);
//prompt user for pay amount
printf("Enter pay: ");
scanf("%lf", &pay);
double change = pay - cost;
if(pay > cost)
printf("Trasncation complete\nHeres your change: %f\n", change);
else if(pay == cost)
printf("Transaction complete.\n");
else if(pay < cost)
printf("insufficient funds\nStill need: %f", cost - pay);
}
}
// greddy algorithm
void greedy(double change)
{
int i=o;
double number;
double coin[len] = [0.01, 0.05, 0.10, 0.25];
while(i>len)
{
if(coin[i] <= change)
{
number = change / coin[i];
printf("%f of %f is needed", number, change);
change = change * coin[i];
}
i++
}
}
I'm new to C. I've been tasked to run a program that calculates the percentage of students that passed an exam,based on N grade inputs.I don't really understand how functions work in though.This is what I came up with
#include <stdio.h>
#define MAX_N 300
main()
{
int N,grade,i;
float success(N)
{
float sum=0.0;
for (i=0;i<N;i++) {
if (grade>=5) {
sum+=1;
}
float success=sum/N;
return(success);
}
}
printf("How many students? ");
scanf("%d",&N);
printf("Enter grades(0-10) of %d students ",N);
for (i=0;i<N;i++){
scanf("%d",&grade);
}
printf("%f percent of students have passed the exam ",success(N);
return(0);
}
It looks like it should work, however I always get the wrong result.It is stuck on displaying 0.2 or 0.25 for any input I give.Can somebody help?
The problem is that in grade only the last entered data is being stored. Make grade as an array so that all data can be stored.
I guess you are taking multiple value for grade and not taking array for it.
grade should be an array and in loop scanf("%d",&grade[i]); should be implement.
grade should be an array of N integers so that each and every value is stored. You also forgot to multiply success by 100 to get the percentage.
I think I fixed the code:
#include <stdio.h>
#define MAX_N 300
float success(int grade[],int N)
{int i;
float sum=0.0;
for (i=0;i<N;i++) {
if (grade[i]>=5) {
sum+=1;
}
}
float success=sum/N;
return(success*100);
}
int main(){
int N, i;
printf("How many students? ");
scanf("%d",&N);
int grade[N];
printf("Enter grades(0-10) of %d students ",N);
for(i=0;i<N;i++){
scanf("%d", &grade[i]);
}
printf("%f percent of students have passed the exam ", success(grade, N));
return(0);
}
I think you should examine the code I wrote. A little bad code. But it can help.
#include <stdio.h>
int students_success(int *);
int main() {
int n;
printf("How many students?\n");
scanf("%d", &n);
printf("Enter grades(0-10) of %d students\n", n);
int grade;
int pass_std = 0;
for(int i = 0; i < n; ++i) {
scanf("%d", &grade);
pass_std = students_success(&grade);
}
printf("%.2f percent of students have passed exam.\n", (double)pass_std / n);
}
int students_success(int *grade) {
static int pass_std = 0;
if(4 < *grade) {
++pass_std;
}
return pass_std;
}
I've made this program below to calculate the average mark of a student.
Everything works well until I use -1, it is supposed to stop the program as is display the average of all students that have been entered, say Goodbye! and then terminate.
I think my calculations might be wrong though because it is printing the wrong result for the average marks of the students.
Thanks in Advance.
#include <stdio.h>
int main(void)
{
float final_mark(int a_mark1, int a_mark2, int lab_mark, int quiz_mark, int exam_mark);
int i, a_mark1, a_mark2, lab_mark, quiz_mark, exam_mark;
float average_mark = 0.0;
do
{
for (i = 0; i < 2; i++)
{
printf("Enter assignment 1 mark (-1 to quit): ");
scanf("%d", &a_mark1);
if(a_mark1 == -1)
{
average_mark += final_mark(a_mark1, a_mark2, lab_mark, quiz_mark, exam_mark);
if ((average_mark > 1 ) && (average_mark < 100 ))
{
printf("The average student mark is %.2f%% \n", average_mark);
}
printf("Goodbye! \n");
return 0;
}
printf("Enter assignment 2 mark: ");
scanf("%d", &a_mark2);
printf("Enter laboratory mark: ");
scanf("%d", &lab_mark);
printf("Enter quiz mark: ");
scanf("%d", &quiz_mark);
printf("Enter exam mark: ");
scanf("%d", &exam_mark);
printf("Student %d final mark: %.2f \n", i + 1, final_mark(a_mark1, a_mark2, lab_mark, quiz_mark, exam_mark));
}
}
while(a_mark1 != -1);
return 0;
}
float final_mark(int a_mark1, int a_mark2, int lab_mark, int quiz_mark, int exam_mark)
{
float final_mark = a_mark1 * 0.1 + a_mark2 * 0.15 + lab_mark * 0.15 + quiz_mark * 0.1 + exam_mark * 0.5;
return final_mark;
}
I think you need to rethink your logic a little bit. Why not use a while loop to control the flow. Then you can bail out of the program immediately if user inputs -1 right away. You should use an array to store the averages for each student, then you can loop through and find the class average as well.
-Your float final_mark function seems a little sketchy without any parenthesis.
-You should put your function prototype outside of main as well. See below changes.
#include <stdio.h>
#define MAX_STUDENTS 10 //define what the max number of students is
float final_mark(int mark1, int mark2, int lab, int quiz, int exam);
int main()
{
int i = 0, mark1 = 0, mark2 = 0,
lab = 0, quiz = 0, exam = 0;
int num_students;
float students_avg[MAX_STUDENTS] = {0}; //array to hold averages for students
float average = 0;
while (i < MAX_STUDENTS) {
printf("Enter assignment 1 mark (enter -1 to quit):\n");
scanf("%d", &mark1);
if (mark1 == -1)
break; //no more students, break out of while loop
printf("Enter assignment 2 mark: ");
scanf("%d", &mark2);
printf("Enter laboratory mark: ");
scanf("%d", &lab);
printf("Enter quiz mark: ");
scanf("%d", &quiz);
printf("Enter exam mark: ");
scanf("%d", &exam);
average = final_mark(mark1, mark2, lab, quiz, exam);
students_avg[i] = average; //add this average to array
printf("Student # %d average was %.2f\n", i, students_avg[i]);//debug info
i++;
}
num_students = i; //how many students grades did we read?
average = 0; //reset to 0 so we can use below
for (i = 0; i < num_students; i++)
average += students_avg[i];
if (num_students > 0)
printf("Class average is %.2f\n", average/num_students);
else
printf("Goodbye!\n");
return 0;
}
float final_mark(int mark1, int mark2, int lab, int quiz, int exam)
{
//we can just return the calculation
return ((mark1 * 0.1) + (mark2 * 0.15) + (lab * 0.15) + (quiz * 0.1) + (exam * 0.5));
}
Just erase two lines above printf("GOODBYE! \n"); you will get what you want.
maybe you have to initialized mark s variables to 0. and a_mark1 to 0 too if the user enter -1
Need help adjusting code to allow for undetermined number of students. Tried to modify with help I received last week, but it seems like I am not doing it correctly.
#include <stdio.h>
int main ()
{
/* variable definition: */
char StudentName[100];
float ExamValue, Sum, Avg;
int students,exams;
// Loop through 5 Students
for (students=0; students <5 ; students++)
{
// reset Sum to 0
Sum =0.0;
printf("Enter Student Name \n");
scanf("%s", StudentName);
// Nested Loop for Exams
for (exams=0; exams < 3; exams++)
{
printf ("Enter exam grade: \n");
scanf("%f", &ExamValue);
Sum += ExamValue;
}
Avg = Sum/3.0;
printf( "Average for %s is %f\n",StudentName,Avg);
}
return 0;
}
Not sure how I need to go about changing the code. Any help will be greatly appreciated
Not sure I understand correctly, I understood you want to loop an undertemined amount of students.
I will assume you want to stop if certain keyword is added as a student name, let's say "quit".
Without changing your structure much, it would look like this.
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
int main (){
char StudentName[100];
float ExamValue, Sum, Avg;
int students,exams;
bool in = true;
while (in) {
Sum =0.0;
printf("Enter Student Name \n");
scanf("%s", StudentName);
if( strcmp(StudentName, "Quit") == 0 || strcmp(StudentName, "quit") == 0){
in = false;
break;
}
for (exams=0; exams < 3; exams++){
printf ("Enter exam grade: \n");
scanf("%f", &ExamValue);
Sum += ExamValue;
}
Avg = Sum/3.0;
printf( "Average for %s is %f\n",StudentName,Avg);
}
return 0;
}
I need help on two questions, Its not homework but its to study for an exam. I need to have these questions because i was allowed 1 full page of notes for the exam. If you could help me these two simple questions for me that would be great. Here are the questions:
"Write a function called getGrades. The function that repeatedly prompts the user for positive integers until the user enters a negative value to stop. The function should return the average of these grades and the highest grade."
"Write a function called Get_Info that takes a pointer to a student structure, (that has three fields: char array called name, an int id, and a double gpa) as its only argument. The function prompts the user for the required information to fill the structure and stores it in the appropriate fields."
What I have so far, Let me know if they are correct and if i need to add anything.
1.
double getGrades() {
double average;
double i;
For(i=1 ; i<i; i++)
{
printf("Enter Grade1:\n");
scanf("%lf", &i);
}
if (i<0)
{
(double) average == (grade1 + grade2 + grade3) / 3;
return average;
}
}
2.
typedef struct {
int id;
double gpa;
char name[SIZE];
} student;
void Get_Info(student list[], int num) {
int i;
for(i=0; i<num; i++) {
printf("\nName:%s", list[i].name);
printf("\nGPA:%lf", list[i].gpa);
printf("\nID: %d\n", list[i].id);
}
}
On #1: The requirement is that the function accept ints. You are scanning for doubles.
The requirement is "The function should return the average of these grades and the highest grade." You only return one double, when two different outputs are called for.
Your for loop is written as "For" (C is case-sensitive), and is based on the test i<i. When will i ever be less than itself??
Here's my version of it.
double getGrades(int* max)
{
int sum = 0;
int input;
int i = 0;
*max = 0;
printf("Enter Grade #%d:\n", i+1);
scanf("%d", &input);
while (input > 0) {
if (*max < input) {
*max = input;
}
sum = sum + input;
i++;
printf("Enter Grade #%d:\n", i+1);
scanf("%d", &input);
}
return i? ((double)sum / i) : 0;
}
Your #2 is much better than your #1, but still has some errors:
The requirement is that the function takes a pointer to a student struct, NOT an array.
It should then print a series of Prompts, and get a series of answers (just as you did in #1).
This is a sequence of printf/scanf.
And when using scanf, you typically pass the ADDRESS of the variable, using &.
(strings are a exception, however)
Here is my version:
typedef struct {
char name[SIZE];
int id;
double gpa;
} student;
void Get_Info(student* ps) {
printf("Enter Name\n");
scanf("%s", ps->name);
printf("Enter ID:\n");
scanf("%d", &ps->id);
printf("Enter GPA\n");
scanf("%lf", &ps->gpa);
}
Try this. It should seem intuitive enough:
double getGrades() {
double average;
double grade;
double total = 0;
int count = 0;
while (1) {
printf("Enter grade: ");
scanf("%d", &grade);
if (grade < 0) {
if (count == 0) {
average = 0;
break;
}
average = total/count;
break;
}
count++;
total += grade;
}
return average;
}