warning: assignment makes integer from pointer without a cast

Hello, hopefully someone will be able to help me.

"warning: assignment makes integer from pointer without a cast" is the error i get when i try to compile simple program that converts numer score into letter grade. What am I doing
wrong?

Thanks in advance,
Andriy

This is the code:

Code:

#include <stdio.h>

int
main(void)

{
        char grade;
        int get_score, num_score;

        /*get users input */

        printf("Type in the numeric grade and press return> ");
        scanf("%lf", &num_score);

        /*converts the numeric score to letter grade*/

        if(num_score > 89)
           grade = "A";
        else if(num_score > 79)
           grade = "B";
        else if(num_score > 69)
           grade = "C";
        else if(num_score > 59)
           grade = "D";
        else if(num_score < 58)
           grade = "F";

        /*prints out the letter grade */

        printf("Your score of %lf is a %c grade.\n",
                 num_score, grade);

        return(0);
}

>> grade = "A";

double quotes are for string literals - use single quotes.

thanks for the quick reply. Now my program compiles, but when i enter a number grade, my output is:

Code:

Type in the numeric grade and press return> 70
Your score of 0.000000 is a R grade.

Any idea why this is happening? I can't really see anything wrong with my code (but I just started learning). Strange.

Originally Posted by ademkiv

thanks for the quick reply. Now my program compiles, but when i enter a number grade, my output is:

Code:

Type in the numeric grade and press return> 70
Your score of 0.000000 is a R grade.

Any idea why this is happening? I can't really see anything wrong with my code (but I just started learning). Strange.

You need to read up on format specifiers.

looks like i'm screwed. I have to write this program using functions, but at first i was trying to write it the simplest way possible and then modify it to use functions. It looks like I can't even do the simple part.

man, dont give up so easy... use his suggestion and roll with it, perhaps to google?
and maybe do a search for something like ... hmm

C format specifiers

or maybe you should just store your scores in double's instead of int's

Code:

#include <stdio.h>

int
main(void)

{
        char grade;
       double num_score;

        /*get users input */

        printf("Type in the numeric grade and press return> ");
        scanf("%lf", &num_score);

        /*converts the numeric score to letter grade*/

        if(num_score > 89)
           grade = 'A';
        else if(num_score > 79)
           grade = 'B';
        else if(num_score > 69)
           grade = 'C';
        else if(num_score > 59)
           grade = 'D';
        else if(num_score < 58)
           grade = 'F';

        /*prints out the letter grade */

        printf("Your score of %f is a %c grade.\n",
                 num_score, grade);

        return(0);
}

ok here is the code,i have made the changes,just use copy and paste (no need to type the changes again. )
want this done in function style,just ask.
anystyle u want.
dont worry,i am here to do all your homework for u FOR FREE.




__________________________________________________ __

You also might want to reconsider those if statements. For example, what if the user got a between a 58 and a 59 for a grade? Try typing that into the input and see what it prints for a letter grade, then see if you can find the problem.

Just a simple else will do at the end because the score can be nothing else.

Code:

        else if(num_score > 59)
           grade = 'D';
        else
           grade = 'F';

qqqqxxxx, thank you, it works now! As for my homework, i'm going do it myself because i want to learn something. If I will have problems then I will ask.

I have a lab today where I will need to convert this program to use functions. Hopefully everything will go smooth.

Thank you to everyone who tried to help.

YAY! Exactly the kind of attidude we want to see among newcomers!

As for qqqqxxxx; You are in no way at all helping a person by doing their whole homework! They dont learn anything, they might come here and expect us to do all the homework for them in the future, and in worst case, they will fail! Simply dont do all the work for them!

Hello again,

Here's my 1st attempt to convert that program to use functions with some added functionality.

Code:

#include <stdio.h>
        
/* Prompts user to enter the score */

int getScore(int numScore);

/*Converts a numberic score to a letter grade */

char convertGrade(int numScore);
        
/*Displays the original numeric score, the corresponding letter grade
 *if the score is valid, and an appropriate eror message if the score
 *if the score is not valid 
 */
          
void showGrade(int numScore, char letterGrade);  
          
int 
main(void);
{
        
        char    letterGrade, printGrade, showGrade, convertGrade;
        int     numScore;

        getScore(numScore);

        letterGrade = convertGrade(numScore);
        
        printGrade = showGrade(numScore);
        
        return(showGrade);  
}
       /*Fuction that prompts user to enter the score */
          
int getScore(int numScore);
{
        printf("Please enter numeric grade  and press return>");
        scanf("%d", &numScore);
}
        
/*Function converts a numeric score to a letter grade */
        
char convertGrade (int numScore, char letterGrade);
{
        if(numScore >= 90)
          letterGrade = 'A';
        else if(numScore >= 80)
          letterGrade = 'B';
        else if(numScore >= 70)
          letterGrade = 'C';
        else if(numScore >= 60)
          letterGrade = 'D';
        else if(numScore <= 59)
          letterGrade = 'F';
        else if(numScore > 100 && numScore < 0)
          letterGrade = 'Z';   
}
        
/*Function prints out the letter grade */
{       
void showGrade(int numScore, char letterGrade);
 
        if(letterGrade='Z')
        printf("\nYour score of %f is not valid.\n", letterGrade);
        else 
        printf("\nYour score of %f is a %c grade.\n", numScore, letterGrade);
        
}

When I try to compile the code, i get the following errors.

Code:

grade_calc.c:19: error: syntax error before '{' token
grade_calc.c:24: warning: parameter names (without types) in function declaration
grade_calc.c:24: warning: data definition has no type or storage class
grade_calc.c:26: error: initializer element is not constant
grade_calc.c:26: warning: data definition has no type or storage class
grade_calc.c:28: error: too few arguments to function `showGrade'
grade_calc.c:28: error: void value not ignored as it ought to be
grade_calc.c:28: error: initializer element is not constant
grade_calc.c:28: warning: data definition has no type or storage class
grade_calc.c:30: error: syntax error before "return"
grade_calc.c:36: error: syntax error before '{' token
grade_calc.c:38: error: syntax error before string constant
grade_calc.c:38: error: conflicting types for 'scanf'
grade_calc.c:38: note: a parameter list with an ellipsis can't match an empty parameter name list declaration
grade_calc.c:38: error: conflicting types for 'scanf'
grade_calc.c:38: note: a parameter list with an ellipsis can't match an empty parameter name list declaration
grade_calc.c:38: warning: data definition has no type or storage class
grade_calc.c:43: error: conflicting types for 'convertGrade'
grade_calc.c:8: error: previous declaration of 'convertGrade' was here
grade_calc.c:43: error: conflicting types for 'convertGrade'
grade_calc.c:8: error: previous declaration of 'convertGrade' was here
grade_calc.c:44: error: syntax error before '{' token

Any suggestions??

> main(void);
Function declarations don't have ; at the end (all 3 of them)

You're mixing them with function prototypes (which do end with a ; )

Originally Posted by Salem

> main(void);
Function declarations don't have ; at the end (all 3 of them)

You're mixing them with function prototypes (which do end with a ; )

Thanks, I made the changes and now I get a few errors when compiling:

Code:

grade_calc.c: In function `main':
grade_calc.c:26: error: called object is not a function
grade_calc.c:28: error: called object is not a function
grade_calc.c: At top level:
grade_calc.c:44: error: conflicting types for 'convertGrade'
grade_calc.c:8: error: previous declaration of 'convertGrade' was here
grade_calc.c:44: error: conflicting types for 'convertGrade'
grade_calc.c:8: error: previous declaration of 'convertGrade' was here
grade_calc.c:60: error: syntax error before '{' token

> grade_calc.c:26: error: called object is not a function
> printGrade = showGrade(numScore);
You have a local variable with the same name as a function.