strcat问题了 [英] strcat problem again
问题描述
继续我的strcat分段错误发布 -
我在使用
strcat附加两个sting文字时出现问题。
我试图通过编写我自己的函数来修复它，它可以执行strcat
（mystract）。节目如下。
然而这似乎没有解决问题，我不知道为什么它不应该？b $ b不应该？
任何进一步的帮助，我将做错的其他事情将被赞赏
问候
伊恩。
该计划的想法是：
#enter一个整数转换为单词
＃99 - 输入
#ninety nine --output
Ps尝试返回sprintf并使用宏而没有运气。
#include< stdio.h>
#include< stdlib.h>
#include< string.h>
char * convertLessThanOneThousand（int number）;
char * convert（int number）;
char * mystrcat（char * dest，char * source）;
static int num;
/ * static char dest [1024]; * /
static char * numNames [] = {
""，
"一个，
两个，
三个，
四个，
五，
六个，
七，
8，
九，
十，
"十一，
十二，
十三，
十四，
十五，
十六，
十七，
十八，
十九
};
静态字符* tensNames [] = {
""，
" ;十，
"二十，
三十，
四十，
五十，
六十，
七十，
八十，
九十
};
char * majorNames [] = {
""，
"千，
百万，
亿美元，
"万亿美元，
" quadrillion，
quintillion"
};
int main（）{
printf（"输入一个转换为单词的整数）;
scanf（"％d"，& num）;
printf（"转换为字词：％s \ n"，convert（num））;
返回0;
}
char * convertLessThanOneThousand（int number）{
char * soFar;
/ * char buffer [10000];
char * soFar;
soFar = buffer; * /
/ * char result [256]; * /
/ * char * hundred =" hundred"; * /
char hundred [] =" hundred";
if（number％100< 20）{
soFar = numNames [number％100];
number / = 100;
}
else {
soFar = numNames [number％10];
number / = 10;
soFar = mystrcat（tensNames [number％10]，soFar）;
number / = 10;
}
if（number == 0）
返回soFar;
/ * return numNames [number] +"百" + soFar; * /
/ * sprintf（结果，'％s％s％s"，numNames [数字]，百，soFar）; * /
返回mystrcat（numNames [number]，mystrcat（百，soFar））;
}
char * convert（int number）{
char * zero =" zero";
if（number == 0）{
返回零; }
char * prefix ="" ;;
char * soFar ="" ;;
int place = 0;
do {
int n = number％1000;
if（n！= 0）{
char * s = convertLessThanOneThousand（n）;
/ * soFar = s + majorNames [place] + soFar; * /
soFar = mystrcat（s，mystrcat（majorNames [place]， soFar））;
}
place ++;
number / = 1000;
} while（number> 0）;
/ * return（前缀+ soFar）.trim（）; * /
返回（mystrcat（前缀，soFar））;
}
char * mystrcat（char * dest，char * source）{
while（* dest）{}
dest--;
while（* dest ++ = * source ++）{}
返回dest;
}
Hi,
Continuing my strcat segmentation fault posting-
I have a problem which occurs when appending two sting literals using
strcat.
I have tried to fix it by writing my own function that does the strcat
(mystract). Program below.
However this appears not to have fixed the problem and I don''t know why it
shouldn''t ?
Any further help as to what else I am doing wrong will be appreciated
regards
Ian.
The idea of the program is to:
#enter a integer to convert to words
#99 -- input
#ninety nine --output
Ps tried returning sprintf and using macros with no luck.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char* convertLessThanOneThousand(int number);
char* convert(int number);
char* mystrcat(char* dest, char* source);
static int num;
/*static char dest[1024];*/
static char *numNames[] = {
"",
" one",
" two",
" three",
" four",
" five",
" six",
" seven",
" eight",
" nine",
" ten",
" eleven",
" twelve",
" thirteen",
" fourteen",
" fifteen",
" sixteen",
" seventeen",
" eighteen",
" nineteen"
};
static char *tensNames[] = {
"",
" ten",
" twenty",
" thirty",
" forty",
" fifty",
" sixty",
" seventy",
" eighty",
" ninety"
};
char *majorNames[] = {
"",
" thousand",
" million",
" billion",
" trillion",
" quadrillion",
" quintillion"
};
int main(){
printf("enter a integer to convert to words ");
scanf("%d", &num);
printf("converted to words: %s\n", convert(num));
return 0;
}
char* convertLessThanOneThousand(int number) {
char* soFar;
/*char buffer[10000];
char* soFar;
soFar = buffer;*/
/* char result[256];*/
/*char* hundred = "hundred";*/
char hundred[] = "hundred";
if (number % 100 < 20){
soFar = numNames[number % 100];
number /= 100;
}
else {
soFar = numNames[number % 10];
number /= 10;
soFar = mystrcat(tensNames[number % 10], soFar);
number /= 10;
}
if (number == 0)
return soFar;
/*return numNames[number] + " hundred" + soFar;*/
/*sprintf(result, "%s%s%s", numNames[number], hundred, soFar);*/
return mystrcat(numNames[number], mystrcat(hundred, soFar));
}
char* convert(int number) {
char* zero = "zero";
if (number == 0) {
return zero; }
char* prefix = "";
char* soFar = "";
int place = 0;
do {
int n = number % 1000;
if (n != 0){
char* s = convertLessThanOneThousand(n);
/*soFar = s + majorNames[place] + soFar;*/
soFar = mystrcat(s, mystrcat(majorNames[place], soFar));
}
place++;
number /= 1000;
} while (number > 0);
/*return (prefix + soFar).trim();*/
return (mystrcat(prefix, soFar));
}
char* mystrcat(char* dest, char* source){
while(*dest){}
dest--;
while(*dest++ = *source++){}
return dest;
}
推荐答案
" Ian Stanley" < IA ******** @ hotmail.com>写在
新闻：3f ******** @ news.chariot.net.au:
"Ian Stanley" <ia********@hotmail.com> wrote in
news:3f********@news.chariot.net.au:
继续我的strcat分段错误发布 -
我有一个问题，当使用
strcat附加两个sting文字时发生。
我试图通过编写我自己的函数来修复strcat
（mystract）。下面的程序。
然而，这似乎没有解决问题，我不知道为什么它不应该？
Hi,
Continuing my strcat segmentation fault posting-
I have a problem which occurs when appending two sting literals using
strcat.
I have tried to fix it by writing my own function that does the strcat
(mystract). Program below.
However this appears not to have fixed the problem and I don''t know why
it shouldn''t ?
是否* *任何*原因你不能启动调试器并单步执行
此代码？这就是我无法看到自己的错误。
-
- 马克 - >
-
Is there *any* reason you can''t fire up a debugger and single step through
this code? This is what I do when I simply cannot see my mistake.
--
- Mark ->
--
srtcat要求已经提供它应该写入的内存
...听起来好像你正在写缓冲区和系统段故障
...
i没有读完全源..所以也许我只是在写废话..
Clemens
On Thu，2003年9月18日00:05:28 +0930
Ian Stanley < IA ******** @ hotmail.com>写道：
srtcat requires that the memory it should write to is already provided
... sounds like you''re writing over your buffer and the system seg faults
...
i didn''t read the full source .. so maybe i''m just writing nonsense..
Clemens
On Thu, 18 Sep 2003 00:05:28 +0930
"Ian Stanley" <ia********@hotmail.com> wrote:
继续我的strcat分段错误发布 -
我在使用
strcat追加两个sting文字时会出现问题。我已经尝试通过编写我自己的函数来修复它了strcat
（mystract）。以下计划。
然而，这似乎没有解决问题，我不知道为什么它不应该？
任何进一步的帮助，我还有什么其他错误将感谢
问候
Ian。
该计划的想法是：
#enter一个整数转换为单词
＃99 - 输入
#ninety nine --output
Ps尝试返回sprintf并使用宏而没有运气。
#include< stdio.h>
#include< stdlib.h>
#include< string.h>
char * convertLessThanOneThousand（int number）;
char * convert（int number）;
char * mystrcat（char * dest，char * source ）;
static int num;
/ * static char dest [1024]; * /
static char * numNames [] = {
""，
"一个，
两个，
三个，
四，
五，
六，
七，
八，
九，
十，
十一，
十二，
十三，
十四，
十五，
十六，
十七，
十八，
十九
};
静态字符* tensNames [] = {
""，
"十，
二十，
三十，
四十，
五十，
六十，
七十，
八十，
九十
};
char * majorNames [] = {
""，
"千，
百万，
亿，
万亿，
千万亿，
quintillion"
};
int main（）{
printf（输入一个转换为单词的整数）;
scanf（"％d"，&） num）;
printf（"转换为单词：％s \ n"，convert（num））;
返回0;
}
char * convertLessThanOneThousand（int number）{
char * soFar;
/ * char buffer [10000];
char * soFar;
soFar = buffer; * /
/ * char result [256]; * /
/ * char * hundred =" hundred" * /
char hundred [] =" hundred"
if（number％100< 20）{
soFar = numNames [number％100];
number / = 100;
}
else {
soFar = numNames [number％10];
number / = 10;
soFar = mystrcat（tensNames [number％10]，soFar）;
number / = 10;
}
if（ number == 0）
返回soFar;
/ * re转numNames [number] +"百" + soFar; * /
/ * sprintf（结果，'％s％s％s"，numNames [number]，百，soFar）; * /
返回mystrcat（numNames [number]，mystrcat （百，soFar））;
}
char * convert（int number）{
char * zero =" zero" ;;
if（number == 0）{
返回零; }
char * prefix ="" ;;
char * soFar ="" ;;
int place = 0;
do {
int n = number ％1000;
if（n！= 0）{
char * s = convertLessThanOneThousand（n）;
/ * soFar = s + majorNames [place] + soFar; * /
soFar = mystrcat（s，mystrcat（majorNames [place]，soFar））;
}
放置++;
number / = 1000;
} while（number> 0） ;
/ * return（前缀+ soFar）.trim（）; * /
返回（mystrcat（前缀，soFar））;
}
char * mystrcat （char * dest，char * source）{
while（* dest）{}
dest--;
while（* dest ++ = * source ++）{}
返回dest;
}
Hi,
Continuing my strcat segmentation fault posting-
I have a problem which occurs when appending two sting literals using
strcat.
I have tried to fix it by writing my own function that does the strcat
(mystract). Program below.
However this appears not to have fixed the problem and I don''t know
why it shouldn''t ?
Any further help as to what else I am doing wrong will be appreciated
regards
Ian.
The idea of the program is to:
#enter a integer to convert to words
#99 -- input
#ninety nine --output
Ps tried returning sprintf and using macros with no luck.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char* convertLessThanOneThousand(int number);
char* convert(int number);
char* mystrcat(char* dest, char* source);
static int num;
/*static char dest[1024];*/
static char *numNames[] = {
"",
" one",
" two",
" three",
" four",
" five",
" six",
" seven",
" eight",
" nine",
" ten",
" eleven",
" twelve",
" thirteen",
" fourteen",
" fifteen",
" sixteen",
" seventeen",
" eighteen",
" nineteen"
};
static char *tensNames[] = {
"",
" ten",
" twenty",
" thirty",
" forty",
" fifty",
" sixty",
" seventy",
" eighty",
" ninety"
};
char *majorNames[] = {
"",
" thousand",
" million",
" billion",
" trillion",
" quadrillion",
" quintillion"
};
int main(){
printf("enter a integer to convert to words ");
scanf("%d", &num);
printf("converted to words: %s\n", convert(num));
return 0;
}
char* convertLessThanOneThousand(int number) {
char* soFar;
/*char buffer[10000];
char* soFar;
soFar = buffer;*/
/* char result[256];*/
/*char* hundred = "hundred";*/
char hundred[] = "hundred";
if (number % 100 < 20){
soFar = numNames[number % 100];
number /= 100;
}
else {
soFar = numNames[number % 10];
number /= 10;
soFar = mystrcat(tensNames[number % 10], soFar);
number /= 10;
}
if (number == 0)
return soFar;
/*return numNames[number] + " hundred" + soFar;*/
/*sprintf(result, "%s%s%s", numNames[number], hundred, soFar);*/
return mystrcat(numNames[number], mystrcat(hundred, soFar));
}
char* convert(int number) {
char* zero = "zero";
if (number == 0) {
return zero; }
char* prefix = "";
char* soFar = "";
int place = 0;
do {
int n = number % 1000;
if (n != 0){
char* s = convertLessThanOneThousand(n);
/*soFar = s + majorNames[place] + soFar;*/
soFar = mystrcat(s, mystrcat(majorNames[place], soFar));
}
place++;
number /= 1000;
} while (number > 0);
/*return (prefix + soFar).trim();*/
return (mystrcat(prefix, soFar));
}
char* mystrcat(char* dest, char* source){
while(*dest){}
dest--;
while(*dest++ = *source++){}
return dest;
}
Ian Stanley写道：
Ian Stanley wrote:
继续我的strcat分段错误发布 -
我有一个附加时出现的问题两个sting文字使用
strcat。
你根本不能连接字符串文字*。要连接它们，
你必须更新第一个，但你不能更新
一个字符串文字。今天BOOM。
目击者：
静态字符* numNames [] = {
""，
"一个，
两个，
三个，
四，
五，
六，
七，
八，
九，
十，
十一，
十二，
十三，
十四，
十五，
十六，
十七，
十八，
19"
返回mystrcat（numNames [number]，mystrcat（百，soFar））;
char * mystrcat（char * dest，char * source）{
while（* dest）{}
dest--;
while（* dest ++ = * source ++）{}
返回dest;
}
Hi,
Continuing my strcat segmentation fault posting-
I have a problem which occurs when appending two sting literals using
strcat.
You can''t concatenate string literals *at all*. To concatenate them,
you''d have to update the first one, but you''re not permitted to update
a string literal. BOOM today.
Witness:
static char *numNames[] = {
"",
" one",
" two",
" three",
" four",
" five",
" six",
" seven",
" eight",
" nine",
" ten",
" eleven",
" twelve",
" thirteen",
" fourteen",
" fifteen",
" sixteen",
" seventeen",
" eighteen",
" nineteen" return mystrcat(numNames[number], mystrcat(hundred, soFar)); char* mystrcat(char* dest, char* source){
while(*dest){}
dest--;
while(*dest++ = *source++){}
return dest;
}
如果mystrcat一直工作[它不会，因为在
第一个while循环]，你将更新numNames中的一个字符串文字
。没有办法。无论如何，你需要将你的文字复制到一个
BIG ENOUGH缓冲区。
见证：
char * convert（int number）{
char * zero =" zero" ;;
if（number == 0）{
返回零; }
char * prefix ="" ;;
你要么使用C99或C ++，要么不是通常的C，这不是允许
声明后的声明。
-
Chris" electric hedgehog" Dollin
C常见问题解答： http://www.faqs.org/faqs/by-newsgrou...mp.lang.c.html
C欢迎： http://www.angelfire.com/ms3/bchambl...me_to_clc.html
这篇关于strcat问题了的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
