#include "tinyexpr.h"

#include <stdio.h>

int main(int argc, char *argv[])

{

if (argc < 2) {

printf("Usage: example2 \"expression\"\n");

return 0;

}

const char *expression = argv[1];

printf("Evaluating:\n\t%s\n", expression);

/* This shows an example where the variables

* x and y are bound at eval-time. */

double x, y;

te_variable vars[] = {{"x", &x}, {"y", &y}};

/* This will compile the expression and check for errors. */

int err;

te_expr *n = te_compile(expression, vars, 2, &err);

if (n) {

/* The variables can be changed here, and eval can be called as many

* times as you like. This is fairly efficient because the parsing has

* already been done. */

x = 3; y = 4;

const double r = te_eval(n); printf("Result:\n\t%f\n", r);

te_free(n);

} else {

/* Show the user where the error is at. */

printf("\t%*s^\nError near here", err-1, "");

}

return 0;

}