38 lines
835 B
C
38 lines
835 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include "lex.h"
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#include "parser.h"
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int main(int argc, char *argv[]) {
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struct lexer *lex;
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struct expr_node *node;
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if (argc < 2) {
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printf("Usage: %s <expression>\n", argv[0]);
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return 1;
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}
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/*
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//struct lexer *lex = lex_create("x* sin (x ^ 2) * 5.5e+2* cosh (x )");
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//struct lexer *lex = lex_create("-1 + -2 - 3 + 4");
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*/
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lex = lex_create(argv[1]);
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node = parse_expression(lex);
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lex_free(lex);
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if (node) {
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double x;
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node_debug_print(node);
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printf("polygon(");
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for (x = -10.0; x < 10.0; x += 0.1) {
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printf("(%.2f,%.2f),", x, node_eval(node, x));
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}
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printf("(10, -1000),(-10,-1000))\n");
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}
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node_free(node);
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return 0;
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} |