9 #include 10 #include 11 12 char *mystrcat(char *dest, char *source) 13 { 14 char *ptr = dest; 15 if (dest == NULL || source == NULL) { 16 printf("the input string is error!\n"); 17 return NULL; 18 } 19 20 while (*dest++ != '\0') 21 ; 22 dest--; 23 24 while (*dest++ = *source++) 25 ; 26 return ptr...

#include main() { char *b; char *a="test"; strcat(b,a); printf("%s",b); } 编译后执行报错 Segmentation fault，请问为什么

man strcat有一段话是这样说的: The strcat() function appends the src string to the dest string over- writing the ‘\0’ character at the end of dest, and then adds a termi- nating ‘\0’ character. The strings may not overlap, and the dest string must have enough space for the result. [code] char a[5]="this"; char *b="test"; strcat(a,b); pr...

代码如下: #include #include main() { char *c="Golden Global"; char *a="jjjjjjjjj"; char *s; s=(char *)malloc(100*sizeof(char)); char *p; p=s; printf("%p\n",s); strcat(s,c); s=s+2; printf("%p\n" ,s); strcat(s,a); printf("%p\n",s); printf("%s\n",p); return 0...

char * __cdecl strcat ( char * dst, const char * src ) { char * cp = dst; while( *cp ) cp++; /* find end of dst */ while( *cp++ = *src++ ) ; /* Copy src to end of dst */ return( dst ); /* return dst */ } 这是一段微软写的strcat函数，现在有个疑问，为什么CP已经结束了，后面还能继续添加...

[code] #include #include int main() { char s1[] = "hahaha"; char *s2 = "*******\n"; strcat(s1, s2); printf("S1 bytes = %d\n", sizeof(s1)); printf("s1 = %s", s1); return 0; } [/code] 当s2增加字节数时，为什么会出现段错误？

char *sqlTmp = "select a.vendor_id,h.int_id from mscwbb h,objects a where a.int_id=h.int_id and a.foreign_object_ind=0 and h.spc='"; strcat(strsql,sqlTmp); strcat(strsql,hlr_spc); strcat(strsql,"' and a.confirmed<>2"); 其中strcat(strsql,"' and a.confirmed<>2");，编译器是不是自动分配一个变量，然后赋值' and a.confirmed<>2，然后把这个自动变量带入strcat函数作为第二个参数。我看函数的原型为char *strcat...

我基于有人问到strcat函数的问题，就把内核中strcat函数实现的源码等上来，希望那些不知道的同僚们看一下！ char * strcat(char * dest, const char * src) { char *tmp = dest; while (*dest) dest++; while ((*dest++ = *src++) != '\0') ; return tmp; }

strcat会导致覆盖，如果操作不慎会导致程序崩溃。以往的做法是先malloc一块新的内存，拷贝一个字符串进取，然后在这个基础上再strcat。感觉还是很容易出错，分配的大小是个问题。不如stl的string来的直接和安全。 例子:(mingwin gcc3.4.2) #include #include int main(void){ int buf[]={17,3,15,2}; int a=3; char b1[]="abc"; int b=5; char b2[]="xyz"; int c=7; char* b3=strcat(...

#include #include using namespace std; void main() { char * str1 = "You "; cout << "str1(before) = " << str1; char * str2 = "are good"; strcat(str1, str2); cout << "str1(after) = " << str2; } 这段程序编译连接可以通过. 执行strcat(st1, str2)句时会报错:" staticunion.exe 遇到问题需要关闭。我们对此引起的不便表示抱歉。" 后面的cout语句没有输出 谁能告诉...