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" parse error before `else' " **URGENT**

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" parse error before `else' " **URGENT** C/C++ Help forum discussing building and maintaining applications in C/C++. Find out why these languages are the foundation on which other languages are built.

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  #1  
Old October 4th, 2005, 10:38 AM
dekoi dekoi is offline
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" parse error before `else' " **URGENT**
Please help me on this as soon as you can. Thank you so much.

Quote:
#include <stdio.h>

int
main(void)
{
double test1, test2, assign1, assign2, average;
int wholeaverage;
char grade;


printf("Enter mark for the first test: ");
scanf("%lf", &test1);

printf("\n");

printf("Enter mark for the second test: ");
scanf("%lf", &test2);

printf("\n");

printf("Enter mark for the first assignment: ");
scanf("%lf", &assign1);

printf("\n");

printf("Enter mark for the second assignment: ");
scanf("%lf", &assign2);

printf("\n");

average = (test1 + test2 + assign1 + assign2) / 4;

wholeaverage = average;

if(wholeaverage<=100 && wholeaverage>=80)
grade = 'A';

printf("Your grade is %c or %d.\n", grade, wholeaverage);

else if (wholeaverage<=79, wholeaverage>=70)
grade = 'B';

printf("Your grade is %c or %d.\n", grade, wholeaverage);

else if (wholeaverage<=69, wholeaverage>=60)
grade = 'C';

printf("Your grade is %c or %d.\n", grade, wholeaverage);

else if (wholeaverage<=59, wholeaverage>=50)
grade = 'D';

printf("Your grade is %c or %d.\n", grade, wholeaverage);

else if(wholeaverage<=49, wholeaverage>=0)
grade = 'F';

printf("Your grade is %c or %d.\n", grade, wholeaverage);

else
printf("The grade is undefined.\n");


if ((assign1<50 && assign2<50)||(assign1<50 || assign2<50))

if (grade == 'A');
printf("However, since you failed both/one of your assignments, your grade is reduced to B.");

else if (grade == 'B');
printf("However, since you failed both/one of your assignments, your grade is reduced to C.");

else if (grade == 'C');
printf("However, since you failed both/one of your assignments, your grade is reduced to D.");

else if (grade == 'D');
printf("However, since you failed both/one of your assignments, your grade is reduced to F.");

else
printf("However, since you failed both/one of your assignments, and your grade was initially F, the grade is undefined.");


else if ((test1<50 && test2<50) || (test1<50 || test2<50))

printf("Your average is F, since you failed one or both of your tests. \n");
printf("End of Program.\n");

else

printf("End of Program.\n");

return(0);

}


I receive ' parse error before `else' ' errors at basically every 'else' line in the program.

Thank you.
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  #2  
Old October 4th, 2005, 10:47 AM
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It should be something like this:

c Code:
Original - c Code 
  1.  
  2. #include <stdio.h>
  3.  
  4. int main(void)
  5. {
  6.   double test1, test2, assign1, assign2, average;
  7.   int wholeaverage;
  8.   char grade;
  9.  
  10.  
  11.   printf("Enter mark for the first test: ");
  12.   scanf("%lf", &test1);
  13.  
  14.   printf("\n");
  15.  
  16.   printf("Enter mark for the second test: ");
  17.   scanf("%lf", &test2);
  18.  
  19.   printf("\n");
  20.  
  21.   printf("Enter mark for the first assignment: ");
  22.   scanf("%lf", &assign1);
  23.  
  24.   printf("\n");
  25.  
  26.   printf("Enter mark for the second assignment: ");
  27.   scanf("%lf", &assign2);
  28.  
  29.   printf("\n");
  30.  
  31.   average = (test1 + test2 + assign1 + assign2) / 4;
  32.  
  33.   wholeaverage = average;
  34.  
  35.   if(wholeaverage<=100 && wholeaverage>=80)
  36.   {
  37.     grade = 'A';
  38.  
  39.     printf("Your grade is %c or %d.\n", grade, wholeaverage);
  40.   }
  41.   else if (wholeaverage<=79, wholeaverage>=70)
  42.   {
  43.     grade = 'B';
  44.  
  45.     printf("Your grade is %c or %d.\n", grade, wholeaverage);
  46.   }
  47.   else if (wholeaverage<=69, wholeaverage>=60)
  48.   {
  49.     grade = 'C';
  50.  
  51.     printf("Your grade is %c or %d.\n", grade, wholeaverage);
  52.   }
  53.   else if (wholeaverage<=59, wholeaverage>=50)
  54.   {
  55.     grade = 'D';
  56.  
  57.     printf("Your grade is %c or %d.\n", grade, wholeaverage);
  58.   }
  59.   else if(wholeaverage<=49, wholeaverage>=0)
  60.   {
  61.     grade = 'F';
  62.  
  63.     printf("Your grade is %c or %d.\n", grade, wholeaverage);
  64.   }
  65.   else
  66.   {
  67.     printf("The grade is undefined.\n");
  68.   }
  69.  
  70.   if ((assign1<50 && assign2<50)||(assign1<50 || assign2<50))
  71.   {
  72.     if (grade == 'A')
  73.       printf("However, since you failed both/one of your assignments, your grade is reduced to B.");
  74.  
  75.     else if (grade == 'B')
  76.       printf("However, since you failed both/one of your assignments, your grade is reduced to C.");
  77.  
  78.     else if (grade == 'C')
  79.       printf("However, since you failed both/one of your assignments, your grade is reduced to D.");
  80.  
  81.     else if (grade == 'D')
  82.       printf("However, since you failed both/one of your assignments, your grade is reduced to F.");
  83.  
  84.     else
  85.       printf("However, since you failed both/one of your assignments, and your grade was initially F, the grade is undefined.");
  86.  
  87.   }
  88.   else if ((test1<50 && test2<50) || (test1<50 || test2<50))
  89.   {
  90.     printf("Your average is F, since you failed one or both of your tests. \n");
  91.     printf("End of Program.\n");
  92.   }
  93.   else
  94.   {
  95.     printf("End of Program.\n");
  96.   }
  97.  
  98.   return(0);
  99. }
  100.  


Please consult your programming book on how if-then-else statements work and especially pay some attention to the use of code blocks with the curly braces {}...
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  #3  
Old October 4th, 2005, 10:49 AM
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Very simple, if you have an 'if' statement where you want more than one line of code to be conditional, you have to enclose them in braces { }.
Right now, only the first line of code after each if() statement is attached to the condition. The next line is normal code, and as such, the following 'else' can does not belong to any 'if'.
Try this:
cpp Code:
Original - cpp Code 
  1. #include <stdio.h>
  2.  
  3. int
  4. main(void)
  5. {
  6.     double test1, test2, assign1, assign2, average;
  7.     int wholeaverage;
  8.     char grade; 
  9.  
  10.  
  11.     printf("Enter mark for the first test: ");
  12.     scanf("%lf", &test1);
  13.  
  14.     printf("\n");
  15.  
  16.     printf("Enter mark for the second test: ");
  17.     scanf("%lf", &test2);
  18.  
  19.     printf("\n");
  20.  
  21.     printf("Enter mark for the first assignment: ");
  22.     scanf("%lf", &assign1);
  23.  
  24.     printf("\n");
  25.  
  26.     printf("Enter mark for the second assignment: ");
  27.     scanf("%lf", &assign2);
  28.  
  29.     printf("\n");
  30.  
  31.     average = (test1 + test2 + assign1 + assign2) / 4;
  32.  
  33.     wholeaverage = average;
  34.  
  35.     if(wholeaverage<=100 && wholeaverage>=80)      // here you have more than one line in each 'if' statement, so you need braces
  36.     {
  37.         grade = 'A';
  38.  
  39.         printf("Your grade is %c or %d.\n", grade, wholeaverage);
  40.     }
  41.     else if (wholeaverage<=79, wholeaverage>=70)
  42.     {
  43.         grade = 'B';
  44.  
  45.         printf("Your grade is %c or %d.\n", grade, wholeaverage);
  46.     }
  47.     else if (wholeaverage<=69, wholeaverage>=60)
  48.     {
  49.         grade = 'C';
  50.  
  51.         printf("Your grade is %c or %d.\n", grade, wholeaverage);
  52.     }
  53.     else if (wholeaverage<=59, wholeaverage>=50)
  54.     {
  55.         grade = 'D';
  56.  
  57.         printf("Your grade is %c or %d.\n", grade, wholeaverage);
  58.     }
  59.     else if(wholeaverage<=49, wholeaverage>=0)
  60.     {
  61.         grade = 'F';
  62.  
  63.         printf("Your grade is %c or %d.\n", grade, wholeaverage);
  64.     }
  65.     else
  66.     {
  67.         printf("The grade is undefined.\n");
  68.     }
  69. // here every 'if' statement only has one line of code, so you don't need braces.
  70.     if ((assign1<50 && assign2<50)||(assign1<50 || assign2<50))
  71.     {
  72.         
  73.         if (grade == 'A');
  74.             printf("However, since you failed both/one of your assignments, your grade is reduced to B.");
  75.         else if (grade == 'B');
  76.             printf("However, since you failed both/one of your assignments, your grade is reduced to C.");
  77.         else if (grade == 'C');
  78.             printf("However, since you failed both/one of your assignments, your grade is reduced to D.");
  79.         else if (grade == 'D');
  80.             printf("However, since you failed both/one of your assignments, your grade is reduced to F.");
  81.         else 
  82.             printf("However, since you failed both/one of your assignments, and your grade was initially F, the grade is undefined.");
  83.     }
  84.     else if ((test1<50 && test2<50) || (test1<50 || test2<50))
  85.     {
  86.         printf("Your average is F, since you failed one or both of your tests. \n");
  87.         printf("End of Program.\n");
  88.     }
  89.     else
  90.     {
  91.         printf("End of Program.\n");
  92.     }
  93.  
  94.     return(0);
  95.  
  96. }
__________________
This is my code. Is it not nifty?

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Last edited by Itsacon : October 4th, 2005 at 11:09 AM.
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