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whats wrong about my program?help me...

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Join Date: Aug 2009

Posts: 2

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Solved Threads: 0

des6043

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Newbie Poster

whats wrong about my program?help me...

Aug 6th, 2009

what's wrong about this?
why when i compile,it come out expected primary-expression?
what is that?

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
#include<stdio.h>
#include<conio.h>
main()
{
     float Lab,Mid,Pro,Quiz,Final,Total;
 
     printf("\nEnter your mark for Lab:");
     scanf("%f",&Lab);
     printf("\nEnter your mark for Mid Exam:");
     scanf("%f",&Mid);
     printf("\nEnter your mark for Quiz:");
     scanf("%f",&Quiz);
     printf("\nEnter your mark for Project:");
     scanf("%f",&Pro);
     printf("\nEnter your mark for Final Exam:");
     scanf("%f",&Final);
 
     Total=(10/100.0)*Lab+(15/100.0)*Mid+(5/100.0)*Quiz+(20/100.0)*Pro+(50/100.0)*Final;
 
 
     if(Total>=35)
       printf("\nyou are passed");
     else
       printf("\nyou are failed");
 
     if(Total>=80)
       {
       printf("\nyour is grade A",Total);
       printf("\nwell done");
       }
     else if(Total>=75)
       {
        printf("\nyour grade is A-,%f",Total);
        }
     else
       {
        printf("\nyou don't get A-,%f",Total);
        }
     else if(Total>=70)
       {
        printf("\nyour grade is B+,%f",Total);
        }
     else
       {
        printf("\nyou don't get B+,%f",Total);
        }
      else if(Total>=65)
       {
        printf("\nyour grade is B,%f",Total);
        }
      else
       {
        printf("\nyou don't get B,%f",Total);
        }
       else if(Total>=60)
       {
        printf("\nyour grade is B-,%f",Total);
        }
      else 
       {
        printf("\nyou don't get B-,%f",Total);
        }
      else if(Total>=55)
       {
        printf("\nyour grade is C+,%f",Total);
        }
      else 
       {
        printf("\nyou don't get C+,%f",Total);
        }                           
      else if(Total>=50)
       {
        printf("\nyour grade is C,%f",Total);
        }
      else
       {
        printf("\nyou don't get C,%f",Total);
        }
      else if(Total>=45)
       {
        printf("\nyour grade is C-,%f",Total);
        }
      else
       {
        printf("\nyou don't get C-,%f",Total);
        }
      else if(Total>=40)
       {
        printf("\nyour grade is D+,%f",Total);
        }
      else
       {
        printf("\nyou don't get D+,%f",Total);
        }
      else if(Total>=35)
       {
        printf("\nyour grade is D,%f",Total);
        }
      else 
       {
        printf("\nyou don't get D,%f",Total);
        }
 
     getch();
     return 0;
     }
#include<stdio.h>
#include<conio.h>
main()
{
     float Lab,Mid,Pro,Quiz,Final,Total;

     printf("\nEnter your mark for Lab:");
     scanf("%f",&Lab);
     printf("\nEnter your mark for Mid Exam:");
     scanf("%f",&Mid);
     printf("\nEnter your mark for Quiz:");
     scanf("%f",&Quiz);
     printf("\nEnter your mark for Project:");
     scanf("%f",&Pro);
     printf("\nEnter your mark for Final Exam:");
     scanf("%f",&Final);

     Total=(10/100.0)*Lab+(15/100.0)*Mid+(5/100.0)*Quiz+(20/100.0)*Pro+(50/100.0)*Final;


     if(Total>=35)
       printf("\nyou are passed");
     else
       printf("\nyou are failed");

     if(Total>=80)
       {
       printf("\nyour is grade A",Total);
       printf("\nwell done");
       }
     else if(Total>=75)
       {
        printf("\nyour grade is A-,%f",Total);
        }
     else
       {
        printf("\nyou don't get A-,%f",Total);
        }
     else if(Total>=70)
       {
        printf("\nyour grade is B+,%f",Total);
        }
     else
       {
        printf("\nyou don't get B+,%f",Total);
        }
      else if(Total>=65)
       {
        printf("\nyour grade is B,%f",Total);
        }
      else
       {
        printf("\nyou don't get B,%f",Total);
        }
       else if(Total>=60)
       {
        printf("\nyour grade is B-,%f",Total);
        }
      else 
       {
        printf("\nyou don't get B-,%f",Total);
        }
      else if(Total>=55)
       {
        printf("\nyour grade is C+,%f",Total);
        }
      else 
       {
        printf("\nyou don't get C+,%f",Total);
        }                           
      else if(Total>=50)
       {
        printf("\nyour grade is C,%f",Total);
        }
      else
       {
        printf("\nyou don't get C,%f",Total);
        }
      else if(Total>=45)
       {
        printf("\nyour grade is C-,%f",Total);
        }
      else
       {
        printf("\nyou don't get C-,%f",Total);
        }
      else if(Total>=40)
       {
        printf("\nyour grade is D+,%f",Total);
        }
      else
       {
        printf("\nyou don't get D+,%f",Total);
        }
      else if(Total>=35)
       {
        printf("\nyour grade is D,%f",Total);
        }
      else 
       {
        printf("\nyou don't get D,%f",Total);
        }
                                                                                                                                                                                                                                          
     getch();
     return 0;
     }

Last edited by John A; Aug 6th, 2009 at 9:24 pm. Reason: added code tags

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Join Date: Dec 2006

Posts: 2,048

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Solved Threads: 179

Aia

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Postaholic

Re: whats wrong about my program?help me...

Aug 6th, 2009

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
printf("\nyour is grade A",Total);
printf("\nyour is grade A",Total);

Take a look at that one. Figure what are you missing.

When you post code you need to wrapped around code tags to present it in a proper format. See here.

"If it moves, tax it. If it keeps moving, regulate it, and if it stops moving, subsidize it" - Ronald Reagan

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Join Date: Oct 2008

Posts: 46

Reputation: zalezog is an unknown quantity at this point

Solved Threads: 11

zalezog

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Light Poster

Re: whats wrong about my program?help me...

Aug 7th, 2009

Well,It also gives me an error.

Help with Code Tags

C Syntax (Toggle Plain Text)

syntax error before else

every where when you have else statements coming ahead of else if statements.

May be we can alter the structure of the program , if suppose you have a candidate getting less than 35, you still get into the if block

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
if(Total>=80)
.
.
if(Total>=80)
.
.

here and check for grades.

I also don't under the rationale behind the statements like

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
printf("\nyou don't get A-,%f",Total);
.
.
printf("\nyou don't get B,%f",Total);
.
.
printf("\nyou don't get C+,%f",Total);
printf("\nyou don't get A-,%f",Total);
.
.
printf("\nyou don't get B,%f",Total);
.
.
printf("\nyou don't get C+,%f",Total);

I would rather care for my grades than "you don't get" thing.

1st approach:
I would rather have a huge if block which checks whether the toal is greater than 35 and then calculate the grades.

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
const int MINIMUM_PASS_MARKS = 35;
if (total >= MINIMUM_PASS_MARKS) {
    /* and then go on checking for a valid grade*/
}
else {
/* failed*/
}
const int MINIMUM_PASS_MARKS = 35;
if (total >= MINIMUM_PASS_MARKS) {
    /* and then go on checking for a valid grade*/
}
else {
/* failed*/
}

Option 2 :
Well ,you have a set grade for any given marks and a definite increment (5 in your case), So we make an array which holds
marks[] and another array which hold your grades[],it would make things simpler.
Something like this

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
#include<stdio.h>
 
int main(void) {
    const int MAX_MARKS = 100;
    const int mark_range[] = {80, 75, 70, 65, 60, 55, 50, 45, 40, 35};
    const char *grades[] = {"A", "A-", "B+", "B", "B-","C+", "C", "C-",
                     "D+", "D"};
    int total = 0;
    int i = 0;
    int divisons = sizeof (mark_range) / sizeof mark_range[0];
    int passed = 0; /*let 0 represent fail*/
 
    printf("Enter your total ");
    if (scanf("%d", &total) == 1) {
        printf("Your total is %d", total);
            /*Loop through to get your grade*/ 
            for ( i = 0; i < divisons; i++) {
            if (total >= mark_range[i] && total <= MAX_MARKS) {
 
                printf("\nYour grade is %s",grades[i]);
                passed = 1;
                break;
            }
         }
         if (passed == 0)
             printf("\nSorry, you failed.");
    }
    else
        fprintf(stderr, "Error in input");
    return 0;
}
#include<stdio.h>

int main(void) {
    const int MAX_MARKS = 100;
    const int mark_range[] = {80, 75, 70, 65, 60, 55, 50, 45, 40, 35};
    const char *grades[] = {"A", "A-", "B+", "B", "B-","C+", "C", "C-",
                     "D+", "D"};
    int total = 0;
    int i = 0;
    int divisons = sizeof (mark_range) / sizeof mark_range[0];
    int passed = 0; /*let 0 represent fail*/
    
    printf("Enter your total ");
    if (scanf("%d", &total) == 1) {
        printf("Your total is %d", total);
            /*Loop through to get your grade*/ 
            for ( i = 0; i < divisons; i++) {
            if (total >= mark_range[i] && total <= MAX_MARKS) {

                printf("\nYour grade is %s",grades[i]);
                passed = 1;
                break;
            }
         }
         if (passed == 0)
             printf("\nSorry, you failed.");
    }
    else
        fprintf(stderr, "Error in input");
    return 0;
}