hi
i started learning programming two weeks ago. being practicing coding since then.
i wrote a program to calculate gpa, but my program don't execute well despite my compilers (c-free and dev c++) not dictating any bug.
please take a look at my code and help me out.
it does not include 'credit unit' while calculating.
it's a c program:

/*A c programe to calculate GPA*/
1.#include<stdio.h>
2.int main()
3.{
4. char grade;//declares the variable "grade" of type char
5. float gpa;//declares the variable "gpa" of type floating point
6. gpa=0;//initialize the value to zero
7. int sum;//declares the variable "sum" 0f type integer
8. sum=0;//initialize the value to zero
9. int n;//declares the variable "n" 0f type integer
10. printf("enter number of courses:\n";//prompts user to enter number of courses
11. scanf("%d",&n);//collects the number and stores it in th variable 'n'
12. int a[n];//declares an array of n-elements
13. int i;//declares a counter
14. i=0;//initialize the counter
15. do //commence a loop with do...while
16. {
17. int y;//declares a variable 'y'
18. y=a[i];//stores the array in the variable 'y'
19. printf("enter course%d grade:units \n",i+1);//prompts user to enter course grade and credit units
20. scanf("%c\t%d",&grade,&a[i]);//stores the grade in the variable 'c' and units in the array 'a'
21. switch(grade)//commence a switch...case mode to test and assign grades
/*this multiplies the grade and unit for each entry and adds them up*/
22. {
23. case 'A':
24. sum=sum+y*5;
25. break;
26. case 'B':
27. sum=sum+y*4;
28. break;
29. case 'C':
30. sum=sum+y*3;
31. break;
32. case 'D':
33. sum=sum+y*2;
34. break;
35. case 'E':
36. sum=sum+y*1;
37. break;
38. }
39. i++;
40. }
41. while (i<n);//loop terminates when all courses are entered
42. gpa=sum/n;//this calculates the GPA using the formula 'GPA=total score/total credit units
43. printf("total credit unit is %d\n total score is %d\n",n,sum);//this displays the total units and the total score
44. printf("GPA=%f\n",gpa);//this displays the GPA
45. return 0;
46.}/*program written by Patrick*/

What error does it show ?

Line 10, the smiley ; ) , it should be ) ;
line 17, all initialization in C comes in the beginning of the main()
you may want to put default in your switch for ppl that enter grade outside the range allowed. etc

Abeg I don tire, I need water

Kofacts:
What error does it show ?

it does'nt show any error;
i hope these images will help u understand my problem

aerodee:
Line 10, the smiley ; ) , it should be ) ;
line 17, all initialization in C comes in the beginning of the main()
you may want to put default in your switch for ppl that enter grade outside the range allowed. etc

Abeg I don tire, I need water

tnx
baba i get one tanker of water

Why stuck the code with irrelevant comments.

While comments are good and best thing to be in a code. It should be used explain what can be understood.

Comments are good. Don't get me wrong.

tjones007:
Why stuck the code with irrelevant comments.

While comments are good and best thing to be in a code. It should be used explain what can be understood.

Comments are good. Don't get me wrong.

noted sir.
I'm really a newbie in programming.
just wanted u guys to understand my algorithm.

Pato5:
hi
i started learning programming two weeks ago. being practicing coding since then.
i wrote a program to calculate gpa, but my program don't execute well despite my compilers (c-free and dev c++) not dictating any bug.
please take a look at my code and help me out.
it does not include 'credit unit' while calculating.
it's a c program:

/*A c programe to calculate GPA*/
1.#include<stdio.h>
2.int main()
3.{
4. char grade;//declares the variable "grade" of type char
5. float gpa;//declares the variable "gpa" of type floating point
6. gpa=0;//initialize the value to zero
7. int sum;//declares the variable "sum" 0f type integer
8. sum=0;//initialize the value to zero
9. int n;//declares the variable "n" 0f type integer
10. printf("enter number of courses:\n";//prompts user to enter number of courses
11. scanf("%d",&n);//collects the number and stores it in th variable 'n'
12. int a[n];//declares an array of n-elements
13. int i;//declares a counter
14. i=0;//initialize the counter
15. do //commence a loop with do...while
16. {
17. int y;//declares a variable 'y'
18. y=a[i];//stores the array in the variable 'y'
19. printf("enter course%d grade:units \n",i+1);//prompts user to enter course grade and credit units
20. scanf("%c\t%d",&grade,&a[i]);//stores the grade in the variable 'c' and units in the array 'a'
21. switch(grade)//commence a switch...case mode to test and assign grades
/*this multiplies the grade and unit for each entry and adds them up*/
22. {
23. case 'A':
24. sum=sum+y*5;
25. break;
26. case 'B':
27. sum=sum+y*4;
28. break;
29. case 'C':
30. sum=sum+y*3;
31. break;
32. case 'D':
33. sum=sum+y*2;
34. break;
35. case 'E':
36. sum=sum+y*1;
37. break;
38. }
39. i++;
40. }
41. while (i<n);//loop terminates when all courses are entered
42. gpa=sum/n;//this calculates the GPA using the formula 'GPA=total score/total credit units
43. printf("total credit unit is %d\n total score is %d\n",n,sum);//this displays the total units and the total score
44. printf("GPA=%f\n",gpa);//this displays the GPA
45. return 0;
46.}/*program written by Patrick*/

No cout; or cin in 33 to 37 rewrite it again and u end the program with a comment instead of}
You the comment at the heading should be like this 1. /*
2. * c program to calculate GPA (Gpa.cpp)
3 */
22, 38, and 40 is invalid
After #include <stdo> h // needed to perform IO operations
Put
using namespace std; // Also needed for <string>

proxy23:

No cout; or cin in 33 to 37 rewrite it again and u end the program with a comment instead of}
You the comment at the heading should be like this 1. /*
2. * c program to calculate GPA (Gpa.cpp)
3 */
22, 38, and 40 is invalid
After #include <stdo> h // needed to perform IO operations
Put
using namespace std; // Also needed for <string>

it's a c program not c++.
i thought "cout,std" are c++ syntax

This should solve the course unit not showing problem. Add a space before %c in scanf. This will allow scanf to skip any number of white spaces before reading choice
so this

19. printf("enter course%d grade:units \n",i+1);//prompts user to enter course grade and credit units
20. scanf("%c\t%d",&grade,&a[i]);//stores the grade in the variable 'c' and units in the array 'a'

will become

printf("enter grade for course%d \n",i+1);
scanf(" %c",&grade);
printf("enter units for course%d \n",i+1);
scanf(" %d",&a[i]);

NOTE THE SPACES in scanf statements

Another observation is that line 17 and 18 are totally unnecessary. Since you can simply use variable a[i] in the switch cases line 24 for example will be

sum=sum+a[i]*5; instead of sum=sum+y*5;

Finally, you are likely not to get the correct GPA output you want because you divided the total sum grades by the number of courses (variable n) rather than the sum of all course units in array a[] to get the GPA on line 42

gpa=sum/n;

should be

int x;
int total_points;
for (x = 0; x < n; x++){
	 total_points = total_points + a[i];
}

kudaisi:
This should solve the course unit not showing problem. Add a space before %c in scanf. This will allow scanf to skip any number of white spaces before reading choice
so this

19. printf("enter course%d grade:units \n",i+1);//prompts user to enter course grade and credit units
20. scanf("%c\t%d",&grade,&a[i]);//stores the grade in the variable 'c' and units in the array 'a'

will become

printf("enter grade for course%d \n",i+1);
scanf(" %c",&grade);
printf("enter units for course%d \n",i+1);
scanf(" %d",&a[i]);

NOTE THE SPACES in scanf statements

Another observation that line 17 and 18 are totally unnecessary. Since you can simple use a[i] in the switch cases line 24 for example will be

sum=sum+a[i]*5; instead of sum=sum+y*5;

Finally, you not get the output GPA you want because you divided the total sum by the number of course (n) rather than the sum of all unit in array a[] to get the GPA on line 42

gpa=sum/n;

should be

int x;
int total_points;
for (x = 0; x < n; x++){
	 total_points = total_points + a[i];
}

Tnx a lot sir.
I will effect the correction

Pato5:

Tnx a lot sir.
I will effect the correction

You are welcome, let me know if there is anything else I can do to help.

kudaisi:
You are welcome, let me know if there is anything else I can do to help.

It worked.
Pls can a function contain different variable data types i.e a float and integer in the same function?

yes. it can.

#include<stdio.h>
#include<math.h>
int main()
{
double unit;
float gpa;
gpa=0;
float sum;
sum=0;
int n;
printf("enter number of courses:\n";
scanf("%d",&n);
char grade[n];
int a[n];
int i;
for (i=0;i<n;i++)
{
printf("enter course%d grade|unit\n",i+1);
scanf(" %c %ld",&grade[i],&a[i]);
switch(grade[i])
{
case 'A':
sum=sum+5*a[i];
break;
case 'B':
sum=sum+4*a[i];
break;
case 'C':
sum=sum+3*a[i];
break;
case 'D':
sum=sum+2*a[i];
break;
case 'E':
sum=sum+1*a[i];
break;
default:
printf("invalid entry\n";
break;
}
unit=unit+a[i];
}
gpa=sum/unit;
printf("s/n. grade|units\n";
for (i=0;i<n;i++)
{
printf("%d.%c|%d\n",i+1,grade[i],a[i]);
}
printf("total credit unit is %lf\ntotal score is %f\n",unit,sum);
printf("GPA=%f\n",gpa);
return 0;
}

Bad Guy.

kudaisi:
Bad Guy.

#include<studio.h>
Int main(void)
{
/*My main target is to delve in embedded systems ( I'm an EE student).
The prerequisite for embedded systems design/programming is c or asm.
Programming can be boring especially when self tutorial.
The only joy is when u are producing results*/
printf("Once again thanks for your help\n";
return 0;
}

Pato5:

#include<studio.h>
Int main(void)
{
/*My main target is to delve in embedded systems ( I'm an EE student).
The prerequisite for embedded systems design/programming is c or asm.
Programming can be boring especially when self tutorial.
The only joy is when u are producing results*/
printf("Once again thanks for your help\n";
return 0;
}

I hope to see the gpa app. Use. Mosyn sdk to run the code

proxy23:

I hope to see the gpa app. Use. Mosyn sdk to run the code

i will download it and see if i can grasp Software Development.
will update my progress

Pato5:

i will download it and see if i can grasp Software Development.
will update my progress

my opinion though
why dont you add

if ( GPA>= 2.80)
printf(" UPPER CREDIT"
bla bla bla like that

Singapore1:
my opinion though
why dont you add

if ( GPA>= 2.80)
printf(" UPPER CREDIT"
bla bla bla like that

ok
i will add that... it's gonna be cool

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- Must have basic programming knowledge and be ready to learn e.g. .NET, SQL Server, Mobile App Development
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- Physically and mentally fit to perform under pressure
- Must not be above 28 years

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Please what of one year internship for a computer science student?

Pato5:


5. float gpa;//declares the variable "gpa" of type floating point
6. gpa=0;//initialize the value to zero

this might work fine for you at this point because you are working with a program that does not require a high degree of accuracy. avoid declaring a variable as a float and then initializing it with an int if you do indeed delve into embedded systems like you propose to. it could produce rickety software

my 1cent

Just posted a Java GUI version of your GPA calculator https://www.nairaland.com/2264399/urgently-need-assistant-java-gui