Thread: Small q...

I have this code:

Code:

#include <stdio.h>
main()
{
float cent, fahr;

printf("Enter fehrenheit to be converted centigrade: ");
scanf("%f", &fahr);
cent = (5.0/9.0) * (fahr-32.0);
printf("\n%3.0f fehrenheit = %6.1f centigrade\n", fahr, cent);
if (cent > 38)
{
        printf("Dangerously temperature level\n");
}
else if (cent < 35)
{
        printf("Temperature is very low, Hypothermia alert!\n");
}
else
{
        printf("Temperature level not dangerous, but monitor closly\n");

}
}

the program works fine, but at ne of the prompts wen a user enters a letter, the program crashes, can sum1 help, i have tried while loops, but have not been successful

i copied and pasted ur code. it couldnt change double values to float values. it ran find after that

this was the warning after i compiled it:

C:\Temp\Unregistered.c(8) : warning C4244: '=' : conversion from 'double ' to 'float ', possible loss of data

the output wasnt even close to right:

0 fehrenheit = -17.8 centigrade
Temperature is very low, Hypothermia alert!
Press any key to continue

that was the programs original output, with the warning. no matter what farenheit temperature u put in, that was the answer.

to fix your warning:

double cent, fahr;



hope i helped

0 degrees fahrenheit = -18 degrees celsius is correct.
You say it crashes when it expects a float and you enter a letter.
You could enter a string and then do atof.

i dotn think u understood hehe, i could put 10000 F and it would still give me that output.

and it didnt crash on mine either

You could use a combination of fgets() and sscanf().

Code:

#include <stdio.h>
int main(void)
{
char s[20];
int fields_scanned;
float cent, fahr;

do {
   printf("Enter fehrenheit to be converted centigrade: ");
   fgets(s,20,stdin);
   fields_scanned = sscanf(s,"%f", &fahr);
} while (fields_scanned == 0);
cent = (5.0/9.0) * (fahr-32.0);
printf("\n%3.0f fehrenheit = %6.1f centigrade\n", fahr, cent);
if (cent > 38)
{
        printf("Dangerously high temperature level\n");
}
else if (cent < 35)
{
        printf("Temperature is very low, Hypothermia alert!\n");
}
else
{
        printf("Temperature level not dangerous, but monitor closely\n");

}
return 0;
}

Sorry, guys the code I posted in my 1st post, works fine, I just tried it again.

When I entered:

1000 = Dangerously high temperature level
100 = Temperature level not dangerous, but monitor closely
-3 = Temperature is very low, Hypothermia alert!

Think that is correct!!