10 points to whoever can help me fix this.bear in mind I've absolutely no idea how rand works(that's the reason I'm here)

#include <stdio.h>
#include <stdlib.h>
#define num 4
int main()
{
int a,b,c;
int vect[num],i;
int x,y,n;

printf(" Introduzca numero de jugadas ");
scanf("%d",&x);
printf(" Introduzca monto del cual dispone ");
scanf("%d",&y);

do{ y--; printf(" \nLe quedan %d jugadas\n",y);
for(i=0;i<num;i++){
vect[i]=rand() % 10;
a=vect[i];b=vect[i];c=vect[i];
}
if(a==b&&a==c){
x=2*x; printf(" Ganaste el triple\n ");
}
else if(a==b&&a!=c){
x=(3/2)*x; printf(" Ganaste el doble\n ");
}
else if(a=!b&&a==c){
x=(3/2)*x; printf(" Ganaste el doble\n ");
}
else if(b==c&&b!=a){
x=(3/2)*x; printf(" Ganaste el doble\n ");
}
else if(b!=c&&b!=a){
x=(x/2); printf(" Perdiste\n ");
}
while(y>0&&x>1);
system("pause");

}
its supposed to be a slot machine..general tips would be helpful

__________________

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I made some changes, and tried to add comments to explain what I did. Hopefully this helps some.


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

//needed for the line below where we seed
//the random number generator
#include <time.h>

#define num 4
int main()
{
int a,b,c;
int vect[num],i;
int x,y,n;

//otherwise it will generate exactly the
//same "random" numbers every time
srand(time(0));

printf(" Introduzca numero de jugadas ");
scanf("%d",&x);
printf(" Introduzca monto del cual dispone ");
scanf("%d",&y);

do{ y--; printf(" \nLe quedan %d jugadas\n",y);
for(i=0;i<num;i++){
vect[i]=rand() % 10;
//a, b, and c all ended up with the same value,
//the last random number you generated
}

//moved this outside the loop
//so they don't all have the same value
a = vect[0];
b = vect[1];
c = vect[2];

if(a==b&&a==c){
x=2*x; printf(" Ganaste el triple\n ");
}
else if(a==b&&a!=c){
x=(3/2)*x; printf(" Ganaste el doble\n ");
}
else if(a=!b&&a==c){
x=(3/2)*x; printf(" Ganaste el doble\n ");
}
else if(b==c&&b!=a){
x=(3/2)*x; printf(" Ganaste el doble\n ");
}
else if(b!=c&&b!=a){
x=(x/2); printf(" Perdiste\n ");
}
}//added a } that was missing
while(y>0&&x>1);
system("pause");

}

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