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    Error: case label.. Not sure what GCC means.


    I am getting this error running a simple code;

    Code:
    fig04_07.c: In function ‘main’:
    fig04_07.c:35:13: error: case label does not reduce to an integer constant
    fig04_07.c:38:13: error: case label does not reduce to an integer constant
    fig04_07.c:41:13: error: case label does not reduce to an integer constant
    fig04_07.c:44:13: error: case label does not reduce to an integer constant
    fig04_07.c:47:13: error: case label does not reduce to an integer constant
    fig04_07.c:50:13: error: case label does not reduce to an integer constant
    fig04_07.c:51:13: error: case label does not reduce to an integer constant
    Code:
    #include <stdio.h>
    
    int main(void){
        int grade;
        int aCount = 0;
        int bCount = 0;
        int cCount = 0;
        int dCount = 0;
        int fCount = 0;
    
        printf("Enter the letter grades\n");
        printf("Enter the OEF characterto end the input\n");
    
        while ((grade = getchar()) != EOF){
            if (grade <= 90) { grade -= 32; }
            switch (grade) {
                case "A":
                    ++aCount;
                    break;
                case "B":
                    ++bCount;
                    break;
                case "C":
                    ++cCount;
                    break;
                case "D":
                    ++dCount;
                    break;
                case "F":
                    ++fCount;
                    break;
                case "\n":
                case "\t":
                case ' ':
                    break;
                default:
                    printf("Incorrect letter grade entered!\n");
                    printf("Enter a new grade\n");
                    break;
            }
        }
        return 0;
    }
    I wonder, I added the if statement just to lower the letter (making it easier to check), though this simple example was taken from a book (C: How to program 7th edition) I wonder what's wrong?

    Note that the code is modified.
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    Fixed! Forgot C has differences between " and '

    Comments on this post

    • dwise1_aol agrees : Bingo!

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