Can somebody help me, why this aren't working?
I always get: else without a previous if
PS: I'm from Austria, sorry for my bad English :)

``````#include <stdio.h>

int main(void)
{
int w;
double v, s, t;

printf("Dieses Programm berechnet Geschwindigkeiten, Wegdifferenzen und\n"
"Zeitdifferenzen fuer eine gleichfoermige Translation.\n"
"1 ... Berechnung der Geschwindigkeit\n"
"2 ... Berechnung der Wegdifferenz\n"
"3 ... Berechnung der Zeitdifferenz\n");
printf("Bitte waehlen Sie aus:"); scanf("%d", &w); getchar();

if  (w = 1)             printf("Wegdiffernz (in m):\n");        scanf("%lf", &s);   getchar();
printf("Zeitdiffernz (in s):\n");       scanf("%lf", &t);   getchar();
(v = s / t);
printf("Ergebnis:\n Geschwindigkeit: %lf m/s", &v);

else if  (w = 2)        printf("Geschwindigkeit (in m/s):\n");  scanf("%lf", &v);   getchar();
printf("Zeitdiffernz (in s):\n");       scanf("%lf", &t);   getchar();
(s = v * t);
printf("Ergebnis:\n Wegdifferenz: %lf m", &s);

else if (w = 3)         printf("Geschwindigkeit (in m/s):\n");  scanf("%lf", &v);   getchar();
printf("Wegdiffernz (in m):\n");        scanf("%lf", &s);   getchar();
(t = v * s);
printf("Ergebnis:\n Zeitdifferenz: %lf s", &t);
return 0;
}
``````

## All 4 Replies

Hi, Hermelix welcome here at Daniweb! :)
Der Danny von Belgien!
Your main problem at frist glance, is a lack of curly braces.
You can omit them if your if statement only has one line.
If you have many lines you have to use them.
I ALWAYS use them

``````if (condition)
{
line1;
line2; etc.
}
else if (condition)
{
and so on
}
``````

Hope it helps.

Here's your code, formatted and with curly braces as ddanbe explained.

``````    #include <stdio.h>

int main(void)
{
int w;
double v, s, t;

printf("Dieses Programm berechnet Geschwindigkeiten, Wegdifferenzen und\n"
"Zeitdifferenzen fuer eine gleichfoermige Translation.\n"
"1 ... Berechnung der Geschwindigkeit\n"
"2 ... Berechnung der Wegdifferenz\n"
"3 ... Berechnung der Zeitdifferenz\n");
printf("Bitte waehlen Sie aus:"); scanf("%d", &w); getchar();

if (w = 1)
{
printf("Wegdiffernz (in m):\n");
scanf("%lf", &s);
getchar();
printf("Zeitdiffernz (in s):\n");
scanf("%lf", &t);
getchar();
(v = s / t);
printf("Ergebnis:\n Geschwindigkeit: %lf m/s", &v);
}

else if (w = 2)
{
printf("Geschwindigkeit (in m/s):\n");
scanf("%lf", &v);
getchar();
printf("Zeitdiffernz (in s):\n");
scanf("%lf", &t);
getchar();
(s = v * t);
printf("Ergebnis:\n Wegdifferenz: %lf m", &s);
}

else if (w = 3)
{
printf("Geschwindigkeit (in m/s):\n");
scanf("%lf", &v);
getchar();
printf("Wegdiffernz (in m):\n");
scanf("%lf", &s);
getchar();
(t = v * s);
printf("Ergebnis:\n Zeitdifferenz: %lf s", &t);
}

return 0;
}
``````

Big thank you, now it work's :)