int i, j, N;
j=0;
N = len(MyArray)/len(char);
char* tempArray[N]    //malloc this if it doesnt like variable length arrays
while(i=0; i<N; i++){
    if(MyArray[i]<123 && MyArray[i]>96){
        tempArray[j] = MyArray[i];
        j++;
    }
}
while(i=0; i<N; i++){
    if(MyArray[i]<91 && MyArray[i]>64){
        tempArray[j] = MyArray[i];
        j++;
    }
}