Help with c++ code for transitive property of a relation of a set

[reedsu]

Hey i need to make a function for the transitive property of a relation of a set and i cant figure out why this wont work. i think theres an infinite loop in it somewhere but cant tell. any help would be greatly appreciated....

void transitive2(char a[], int size){
bool answer;
bool temp = false;
bool temp2;
char index1, index2;

for(int i=0; i<size; i+2){
for(int j=0; j<size; j+2){
for(int c=0; c<size; c+2){
if(a[j] == a[i+2+c]){
temp2 = true;
index1 = a[i];
index2 = a[i+2+c+1];
break;
}
else temp2 = false;
}

while(temp2 == true){
for(int d=0; d<size; d+2){
if(index1 == a[i+d] && index2 == a[j+d]){
temp = true;
break;
}
else if(index1 == a[i+d]) j+2;
else if(index2 == a[j+d]) i+2;
else{
temp = false;
}
}
if(temp == false)goto end;
}
}
}