Setting Ints to 0 makes code slow, why ?

Code:

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#include <stdio.h>

int main(void)

{

int fahr = 0, total = 0, step = 0;

printf("Fahrenheit ?: ");
scanf("%d", &fahr);

printf("Total ?: ");
scanf("%d", &total);

printf("Steps ?: ");
scanf("%d", &step);

for(fahr = fahr; fahr <= total; fahr+=step)
printf("Fahrenheit: %d\t Celsius %d\n", fahr, (fahr - 32) * 5/9);

}

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If I simply do "int fahr, total, step;" then the code runs immediately but if I set them to 0 it takes ages until the first question comes up and Iam just curious why thats the case ?

Thanks in advance (inserted the text without formatting, hopefully thats correct this time, VisualStudioCode only has the option to "copy").

Quote:

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Originally Posted by crusher152

If I simply do "int fahr, total, step;" then the code runs immediately but if I set them to 0 it takes ages until the first question comes up and Iam just curious why thats the case ?

Thanks in advance (inserted the text without formatting, hopefully thats correct this time, VisualStudioCode only has the option to "copy").

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This would seem to be a compiler/O/S implementation problem. Under Debian Linux, I see no difference, using gcc on the command line, with or without initialization, and should not see any difference!.

Local variables should ALWAYS be initialized.

You should also add the following to the bottom of main();

Code:

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return 0;

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Ok thank you I will reinstall everything and see if it makes a difference. I actually have sometimes compiling issues so something doesnt seem to be right. Again thanks.