36 wiersze
722 B
C
36 wiersze
722 B
C
#include "tinyexpr.h"
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#include <stdio.h>
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/* An example of calling a C function. */
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double my_sum(double a, double b) {
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printf("Called C function with %f and %f.\n", a, b);
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return a + b;
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}
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int main(int argc, char *argv[])
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{
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te_variable vars[] = {
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{"mysum", my_sum, TE_FUNCTION2}
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};
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const char *expression = "mysum(5, 6)";
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printf("Evaluating:\n\t%s\n", expression);
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int err;
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te_expr *n = te_compile(expression, vars, 1, &err);
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if (n) {
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const double r = te_eval(n);
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printf("Result:\n\t%f\n", r);
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te_free(n);
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} else {
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/* Show the user where the error is at. */
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printf("\t%*s^\nError near here", err-1, "");
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}
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return 0;
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}
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