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March 29th, 2013, 09:24 AM
#1
Error in C++ code(Help Required)
5: /*
6: It has numerous flaws.
7: */
8:
9: #include <stdio.h>
10: #include <stdlib.h>
11: #include <string.h>
12:
13: #define MAXWDLNTH 20
14: #define MAXWDCNT 200
15: #define MAXLINELNTH 100
16:
17: /****************************************************************
18: readwords - read blank-separated words from stdin
19: ***************************************************************/
20: int readwords(char words[][MAXWDLNTH]) {
21: int i;
22: char line[MAXLINELNTH];
23: char* word;
24:
25: i = 0;
26: while (gets(line) != NULL) {
27: line[strlen(line)] = '\0'; /* trim off newline character */
28: for (word = strtok(line, " ");
29: word != NULL;
30: word = strtok(NULL, " ")) {
31: strcpy(words[i], word);
32: i++;
33: }
34: }
35: return(i);
36: }
37:
38: /****************************************************************
39: swap - swap 2 words
40: ***************************************************************/
41: void swap(char words[][MAXWDLNTH], int i, int j) {
42: char temp[MAXWDLNTH];
43:
44: strncpy(temp, words[i], MAXWDLNTH);
45: strncpy(words[j], words[i], MAXWDLNTH);
46: strncpy(words[j], temp, MAXWDLNTH);
47: }
48: 49: /****************************************************************
50: sortwords - sort the array of words
51: ***************************************************************/
52: void sortwords(char words[][MAXWDLNTH], int wordcount) {
53: int i;
54: int j;
55:
56: for (i = 2; i < wordcount; i++) {
57: for (j = 1; j < i; j++) {
58: /* If words[i] < words[j] then swap them */
59: if (strcmp(words[i], words[j]) < 0) {
60: swap(words, i, j);
61: }
62: }
63: }
64: }
65:
66: /****************************************************************
67: printwords - print the array of words
68: ***************************************************************/
69: void printwords(char words[][MAXWDLNTH], int wordcount) {
70: int i;
71: int j;
72: int wdlnth;
73:
74: for (i = 1; i < wordcount; i++) {
75: wdlnth = strlen(words[i]);
76: printf(words[i]);
77: printf("\n");
78: }
79: }
80:
81: /****************************************************************
82: main program - no command line arguments
83: ***************************************************************/
84: int main() {
85: /* char words[MAXWDCNT][MAXWDLNTH]; */
86: char* words;
87: int wordcount; /* number of words to sort and print */
88:
89: words = malloc(MAXWDCNT*MAXWDLNTH);
90: /* Read the words */
91: wordcount = readwords(words);
92: /* Sort the words */
93: sortwords(words, wordcount);
94: /* Print the words */
95: printwords(words, wordcount);
96:
97: return(0);
98: }
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March 29th, 2013, 11:10 AM
#2
Re: Error in C++ code(Help Required)
Please format your code correctly and use [code] tags when posting code (Go Advanced, select code and click '#'. Do not use line numbers with the code and indent appropriately for readability.
What flaws? Does it compile? What should the code do and what does it do? Have you tried debugging the code? As this is c++ code, why are you using the c library for input/output and string manipulation rather than the c++ Standard Template Library (STL)?
All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!
C++23 Compiler: Microsoft VS2022 (17.6.5)
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