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Answer to Question #1407 in C++ for Helena Mata

Question #1407
Make a C program that will generate Parkside's Triangle. Given any side and any seeds
Expert's answer
int i;
int lowerlimit;
int
upperlimit;
onSelfEvent(load){
lowerlimit=9;
upperlimit=20;

for(i=lowerlimit;i<=upperlimit;i++){
if
(i%2==0){
_root.Show(i);
}
}
}

int j;
int N;
int
primes = 0;
int nn=0;
int left=0;
int right=0;
function Show(number
) {
isprime = new Array;
N =
number;
for(j=2;j<N;j++){
isprime[j] =
"1";
}
}
for(j=2;j<=N;j++){
if(i*i<N){
if(isprime[j]=="1"){
for(l=j;l<=N;l++){
isprime[i
* j] = "0" ;
}

}
}
}
for(j=2;j<N;j++){
if(isprime[j]=="1"){
primes =
primes + 1;
}
}

list = new Array[primes]

for(j=0;j<N;j++){
if(isprime[j]=="1"){
nn = nn + 1;
list[nn] =
"i";
}
}


left = 0;
right = primes - 1;

while (left
<= right){
if(list[left] + list[right] = N){
break;
else if
(list[left] + list[right] < N){
left = left + 1;
else
right = right
- 1;
}
}
}
if (list[left] + list[right] = N){
trace(N + " = " +
list[left] + " + " + list[right]);
}
else{
trace(N + " not expressible
as sum of two primes");
}
return 0;

}

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