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/**
* oif.c - source file for just testing basic optics-related functions.
*
* Copyright (C) 2025 https://optics-design.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* See the COPYING file for the full license text.
*/
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[]) {
if (argc != 4){
printf("This program calculates relations between object, image and focal length.\nIt requires you to provide two of these and leave the third one as any char in the form of O I F.\nExample: 90 x 50 will output 112.5");
return 1;
}
char *po, *pi, *pf;
float o,i,f;
o = strtof(argv[1], &po);
i = strtof(argv[2], &pi);
f = strtof(argv[3], &pf);
if (*po && !*pi && !*pf) {
o = i*f/(i-f);
}
else if (!*po && *pi && !*pf) {
i = o*f/(o-f);
}
else if (!*po && !*pi && *pf) {
f = o*i/(o+i);
}
else {
printf("Wrong usage of the program! Refer to help");
return 1;
}
printf("Object Distance: %.5f\nImage Distance: %.5f\nFocal Length: %.5f\n",o,i,f);
return 0;
}
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