Brauche Hilfe bei C++-Code
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Hallo,
bin leider der absolute noob und will folgende datei ausführen:
leider weiß ich nicht was ich bei "config.filename" (Zeile 34) usw. eingeben soll, damit der compiler mal keine Fehler zeigt
ich habe einen programmcode in der Sprache Beatnik un dieser c++ code ist quasi der interpreter dafür. Leider scheitere ich bereits an der Ausführung dieses Interpreter weil ich ---> Programmiernoob
kann mir da jmd helfen, wie ich diesen c++-code-interpreter zum laufen bekomme
Hier der Code:
/* Copyright (C) 2007 Rami R Chowdhury 'Beatnik' interpreter, as specified by Cliff Biffle (see http://www.cliff.biffle.org/esoterica/beatnik.html) Licensed under the GNU General Public License, version 2. NB: A working 'Hello World' can be found not at Biffle's page but at http://zaaf.nl/emacs/HelloWorld.beatnik.html */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> // My own simple integer-based stack implementation #include "istack.h" typedef struct _configuration { // Obviously, holds configuration values int stack_size; char* filename; } configuration; // Forward declaration of functions, for convenience and so main() can go up top unsigned char get_score(char* word); int handle_cmdline(int argc, char** argv, configuration* config); char* parse(char* source, unsigned long* len); int execute(char* bytecode, unsigned long max_len, istack* stack); int main(int argc, char** argv) { // First, set configuration defaults configuration config; config.stack_size = 128; config.filename = NULL; if(handle_cmdline(argc, argv, &config) == -1) { // Error handling command-line. Just die gracefully. return -1; } // Now try and get the source code file... FILE* f = fopen(config.filename, ""); if(!f) { fprintf(stderr, "Error opening Beatnik file (%s)!\n", config.filename); return -1; } // Determine file size by seeking to the end and checking position, then resetting unsigned long fsize = 0; fseek(f, 0, SEEK_END); fsize = (unsigned long) ftell(f); fseek(f, 0, SEEK_SET); // Allocates some memory for the file contents, and initializes some variables to // help read it in char* source = calloc(fsize + 1, 1); char* src_ptr = source; unsigned long byte_count; while(!feof(f) && !ferror(f)) { // 4k at a time byte_count = fread(src_ptr, 1, 4096, f); src_ptr += byte_count; } // An error occured -- die if(ferror(f)) { fprintf(stderr, "Error reading the file %s!\n", config.filename); fclose(f); return -1; } // Close file like a good program fclose(f); // Initialize program execution state (parse() returns bytecode and sets max_len to length of // bytecode). Also, free source as it's now redundant. unsigned long max_len; char* bytecode = parse(source, &max_len); istack* stack = stack_init(config.stack_size); free(source); // Go, go Beatnik rangers! int return_val = execute(bytecode, max_len, stack); // Cleanup stack_destroy(stack); free(bytecode); // If execute() returned nonzero, do that as well. return return_val; } int handle_cmdline(int argc, char** argv, configuration* config) { // Parses command-line options with getopt() (POSIX). Returns -1 on error. char opt; opterr = 0; // Disable getopt() errors while ((opt = getopt(argc, argv, "f:s:h")) != -1) { switch(opt) { case 'f': /* Explicit setting of the filename. Generally unnecessary... */ config->filename = optarg; break; case 's': /* Setting the initial stack size (it will grow as required) */ config->stack_size = strtol(optarg, (char**) NULL, 10); if ((config->stack_size < 1) || (config->stack_size > 16384)) { fprintf(stderr, "Invalid initial stack size specified (%d)! Value must be between 1 and 16384!\n", config->stack_size); return -1; } break; case 'h': /* Duh, help and usage */ printf("Beatnik programming language interpreter\n"); printf("Copyright (C) 2007 Rami Chowdhury\n"); printf("----------------------------------------\n"); printf("Executes programs written in the Beatnik language, as specified by\n"); printf("Cliff Biffle (http://www.cliff.biffle.org/esoterica/beatnik.html).\n"); printf("USAGE: %s [-OPTS] [-f] FILENAME\n", argv[0]); printf("\n"); printf("Recognizes the following options:\n"); printf(" -h Shows this help message.\n"); printf(" -s [number] Sets the initial size of the 'stack' on which Beatnik\n"); printf(" performs arithmetic. Low values of this may mean the\n"); printf(" stack has to be resized often, which is slow and in-\n"); printf(" efficient. High values can waste memory.\n"); printf(" Defaults to 128, and can range from 1 to 16384. \n"); printf(" -f [file] Specifies the Beatnik source code file to execute.\n"); printf(" This is generally unnecessary as the first non-option\n"); printf(" argument is assumed to be a Beatnik program file.\n"); return -1; break; default: fprintf(stderr, "Unrecognized option (-%c). Please try %s -h for usage information.\n", optopt, argv[0]); return -1; break; } } if (config->filename == NULL) { // We need a file to execute! if (argv[optind] != NULL) { config->filename = argv[optind]; } else { fprintf(stderr, "No source code file specified!\n"); return -1; } } return optind; } char* parse(char* source, unsigned long* len) { // Tokenizes source and returns a pointer to memory filled with bytecode /* REMINDER: uses strtok() so mutates source! */ // Initially allocates enough memory for all the source text char* buf = calloc(strlen(source) + 1, 1); char* buf_ptr = buf; // Delimiters for tokenizing are any punctuation characters const char* punct = "!\"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ \n\t\r"; char* word = strtok(source, punct); while(word != NULL) { // Keeps going till we run out of tokens (*buf_ptr) = get_score(word); buf_ptr++; // printf("%s scored %d\n", word, *(buf_ptr - 1)); word = strtok(NULL, punct); } // Now allocates a properly sized bytecode region, and copies it in unsigned long code_len = (unsigned long) (buf_ptr - buf); char* bytecode = calloc(code_len + 2, 1); strncpy(bytecode, buf, code_len); free(buf); (*len) = code_len; // tells main() how long the bytecode is return bytecode; } unsigned char get_score(char* word) { // For convenience, Scrabble data is hardcoded ;-) unsigned short tile_scores[] = { 1, // a 3, // b 3, // c 2, // d 1, // e 4, // f 2, // g 4, // h 1, // i 8, // j 5, // k 1, // l 3, // m 1, // n 1, // o 3, // p 10, // q 1, // r 1, // s 1, // t 1, // u 4, // v 4, // w 8, // x 4, // y 10 // z }; // Now making use of the above... unsigned char word_score = 0; unsigned int wlen = strlen(word); char *w = word, *wmax = word + wlen, c = 0; while (w <= wmax) { c = (*w); if (c < 91) { // Uppercase letters are ASCII 65-90, lowercase are 97-122 -- thus // ('a' - 'A') == 32, adding it turns everything to lowercase. c += 32; } if ((c > 96) && (c < 123)) { // It's a letter, so increment word_score by its score. Since // 'a' == 97, subtracting 97 makes c a valid index into tile_scores word_score += tile_scores[c - 97]; // printf("\t%c scored %d, total = %d\n", c, tile_scores[c - 97], word_score); } w++; } return word_score; } int execute(char* bytecode, unsigned long max_len, istack* stack) { char* cur_byte = bytecode; char opcode = 0; int tmp1 = 0, tmp2 = 0; while((cur_byte - bytecode) <= max_len) { // Keep going till we run out of opcodes. The 'stop' opcode will exit the function as well. opcode = *cur_byte; switch(opcode) { case 0: case 1: case 2: case 3: case 4: /* Does nothing. The Beatnik Interpreter may mock you for your poor scoring, at its discretion. */ if (rand() < 5) { fprintf(stderr, "Yeah, dude, %d's a *great* score... <rolls eyes>", opcode); } cur_byte++; break; case 5: /* Finds the score of the next word and pushes it onto the stack. Skips the aforementioned next word. */ stack_push(stack, *(cur_byte + 1)); cur_byte += 2; break; case 6: /* Pops the top number off the stack and discards it. */ stack_pop(stack); cur_byte++; break; case 7: /* Adds the top two values on the stack together, pushing the result. */ tmp1 = stack_pop(stack); tmp2 = stack_pop(stack); stack_push(stack, (tmp1 + tmp2)); cur_byte++; break; case 8: /* Input a character from the user and push its value on the stack. Waits for a keypress. */ printf("Type a character: "); tmp1 = getchar(); stack_push(stack, tmp1); cur_byte++; break; case 9: /* Pop a number off the stack and output the corresponding ASCII character to the screen.*/ tmp1 = stack_pop(stack); putchar(tmp1); cur_byte++; break; case 10: /* Subtract the top value on the stack from the next value on the stack, pushing the result.*/ tmp1 = stack_pop(stack); tmp2 = stack_pop(stack); stack_push(stack, (tmp2 - tmp1)); cur_byte++; break; case 11: /* Swap the top two values on the stack.*/ tmp1 = stack_pop(stack); tmp2 = stack_pop(stack); stack_push(stack, tmp1); stack_push(stack, tmp2); cur_byte++; break; case 12: /* Pop a value of the stack, and push it twice.*/ tmp1 = stack_pop(stack); stack_push(stack, tmp1); stack_push(stack, tmp1); cur_byte++; break; case 13: /* Pop a number from the stack, and figure out the score of the next word. If the number from the stack is zero, skip ahead by [score-of-next-word] words. (The skipping is actually n+1 words, because the word scored is also skipped.)*/ if(stack_pop(stack) == 0) { cur_byte += *(cur_byte + 1); } cur_byte += 2; break; case 14: /* Same as above, except skip if the value on the stack isn't zero. */ if(stack_pop(stack) != 0) { cur_byte += *(cur_byte + 1); } cur_byte += 2; break; case 15: /* Skip back n words, if the value on the stack is zero. */ if(stack_pop(stack) == 0) { cur_byte -= *(cur_byte + 1); } cur_byte++; break; case 16: /* Skip back if it's not zero. */ if(stack_pop(stack) == 0) { cur_byte -= *(cur_byte + 1); } cur_byte++; break; case 17: /* Stop the program */ return 0; break; case 18: case 19: case 20: case 21: case 22: case 23: /* Does nothing. However, the score is high enough that the Beatnik Interpreter will not mock you, unless it's had a really bad day.*/ break; default: /* Garners "Beatnik applause" for the programmer. This generally consists of reserved finger-snapping.*/ fprintf(stderr, "Wow <snap> I'm impressed <snap>\n"); cur_byte++; break; } // printf("Opcode %d, ", opcode); // stack_print(stack); } return 0; }
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Das ist kein C++, dis ist pures C.
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HighLigerBiMBam schrieb:
Das ist kein C++, dis ist pures C.
Dann würde der Code nicht kompilieren ;P
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theliquidwave schrieb:
HighLigerBiMBam schrieb:
Das ist kein C++, dis ist pures C.
Dann würde der Code nicht kompilieren ;P
Scheint er ja auch nicht zu tun. Aber ohne konkrete Fehlermeldung kann man es nicht so genau sagen ...
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Vor allem musst du erst einmal einen C Compiler benutzen, da werden Sachen gemacht die in C++ illegal sind.
In Zeile 34 sehe ich auch nichts falsches. NULL ist ein Standardmakro aus string.h. Das MUSS auf einem standardkonformen Compiler funktionieren. Du kannst versuchen es durch 0 zu ersetzen, wenn es tatsächlich nicht funktionieren sollte.
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@Sep Welches Programm muss ich nehmen?
Habe jetzt codeblocks genommen und der Fehler sieht so aus:
Compiling: C:\Users\Vale\Desktop\beatnik\beatnik.c
C:\Users\Vale\Desktop\beatnik\beatnik.c:34:23: warning: unknown escape sequence '\C'
Linking console executable: C:\Users\Vale\Desktop\beatnik\beatnik.exe
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x1be): undefined reference tostack_init' C:\\Users\\Vale\\Desktop\\beatnik\\beatnik.o:beatnik.c:(.text+0x1fa): undefined reference tostack_destroy'
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x645): undefined reference tostack_push' C:\\Users\\Vale\\Desktop\\beatnik\\beatnik.o:beatnik.c:(.text+0x659): undefined reference tostack_pop'
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x66c): undefined reference tostack_pop' C:\\Users\\Vale\\Desktop\\beatnik\\beatnik.o:beatnik.c:(.text+0x67a): undefined reference tostack_pop'
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x695): undefined reference to `stack_push'collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 1 seconds)
23 errors, 1 warningskann leider nicht alle Fehler posten, da das forum immer heult "max. 10 smilies sind erlaubt..."
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Zeile 34 ist kein echter Fehler, da hast du irgendein verrücktes Zeichen stehen, welches hier im Forum nicht auftaucht.
Der Rest sind Linkerfehler. Da fehlt offensichtlich eine Bibliothek.
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lolhonk schrieb:
C:\Users\Vale\Desktop\beatnik\beatnik.c:34:23: warning: unknown escape sequence '\C'
Das ist "nur" eine Warnung. An der Stelle steht wohl irgend ein Schrott. Probier mal, die Zeile neu einzugeben.
lolhonk schrieb:
Linking console executable: C:\Users\Vale\Desktop\beatnik\beatnik.exe
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x1be): undefined reference tostack_init' C:\\Users\\Vale\\Desktop\\beatnik\\beatnik.o:beatnik.c:(.text+0x1fa): undefined reference tostack_destroy'
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x645): undefined reference tostack_push' C:\\Users\\Vale\\Desktop\\beatnik\\beatnik.o:beatnik.c:(.text+0x659): undefined reference tostack_pop'
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x66c): undefined reference tostack_pop' C:\\Users\\Vale\\Desktop\\beatnik\\beatnik.o:beatnik.c:(.text+0x67a): undefined reference tostack_pop'
C:\Users\Vale\Desktop\beatnik\beatnik.o:beatnik.c:(.text+0x695): undefined reference to `stack_push'Da fehlt offensichtlich mindestens eine weitere Datei (istack.c?), die die Stackimplementierung enthält.
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Super jetzt hast du genau die gleiche Antwort erhalten, wie in dem anderen Thread den du zu dem Thema aufgemacht hast. Unterlasse es, die gleiche Frage mehrmals zu stellen.
