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voidfinder.cpp
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voidfinder.cpp
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#include <iostream>
#include <stdint.h>
#include <fstream>
#include <math.h>
#include "stdio.h"
#include "stdlib.h"
#include <string>
// g++ voidfinder.cpp -o voidfinder -std=c++0x
using namespace std;
int main(int argc, char **argv){
int h;
char number [2];
ifstream file;
int count = 1;
//open file
file.open(argv[argc-1]);
if(argv[1] == string("-c")){
count = atoi(argv[2]);
}
//scan through every point and find voids
//voids occur at -32768
for(int i = 0; i < 2884802; i+=2){ //size of HGT file
file.read(number,2);
h = number[1];
if(h<0){
h = h+255;
}
h+= number[0]*256;
//if there's even one void, print the filename and break
if(h == -32768){
count--;
if(count==0){
cout << argv[argc-1] << "\n";
break;
}
}
}
return 0;
}