Notepad3/src/tinyexprcpp/example3.cpp at master · Stephan-P/Notepad3

30 lines (22 loc) · 666 Bytes

#include "tinyexpr.h"

#include <stdio.h>

/* An example of calling a C function. */

double my_sum(double a, double b) {

printf("Called C function with %f and %f.\n", a, b);

return a + b;

}

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

{

const char *expression = "mysum(5, 6)";

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

te_parser tep;

tep.set_vars({{"mysum", my_sum}});

if (tep.compile(expression)) {

const double r = tep.evaluate();

printf("Result:\n\t%f\n", r);

} else {

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

printf("\t%*s^\nError near here", tep.get_last_error_position(), "");

}

return 0;

}

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