Easy C question from a beginner

[Danimal1209]

Trying to understand why I get a "argument doesn't match prototype" error

#include <stdio.h>
#include <stdlib.h>

void convert_temp(int degreeIn, char scaleIn);

int main() 
{
    int degree1, degree2;
    char scale1, scale2;
    printf("Enter a temperature and a scale\n");
    scanf("%d %c", &degree1, &scale1);
    convert_temp(degree1, scale1);
    printf("%d %c = %d %c\n", degree1, scale1, degree2, scale2);
    return (0);
}

void convert_temp(degreeIn, scaleIn)
{
    printf("HI");
}

And whats the HTML for putting this in a code clock?

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Markbnj
Programming moderator

 

[Markbnj]

You should give the line on which the compiler is complaining. It's been a long time but I'm going to guess that you have the forward declaration and the definition of your function wrong. I'm thinking that instead of:

void convert_temp(int degreeIn, char scaleIn);
void convert_temp(degreeIn, scaleIn)
{
printf("HI");
}

What you want is:

void convert_temp(int degreeIn, char scaleIn);
void convert_temp(int degreeIn, char scaleIn)
{
printf("HI");
}

Or alternatively:


void convert_temp(int, char);
void convert_temp(int degreeIn, char scaleIn)
{
printf("HI");
}

 

[veri745]

Yes, the type of each argument is required in both the prototype and function definition.

The variable names are purely option in the prototype.

 

[Danimal1209]

Oh, I wasn't putting a variable type in the function parameters.

Thanks!