c 语言 string类型,C语言模拟String对象类型

length)

{

if(str->ch[i]>='a' && str->ch[i]<='z')

str->ch[i]-=32;/* Converts to capital */

i++;

}

}

void ToLowerCase(String* str)

{

int i=0;

while(ilength)

{

if(str->ch[i]>='A' && str->ch[i]<='Z')

str->ch[i]+=32;/* Converts to lower case */

i++;

}

}

int StartWith(const String* str,const char* chars)

{

int i=0;

while(*chars!='')

{

if(str->ch[i++] != *chars++)

return FALSE;

}

return TRUE;

}

int EndWith(const String* str,const char* chars)

{

int i=str->length-GetCharsLength(chars);

while(*chars!='')/* chars not end */

{

if(str->ch[i++] != *chars++)/* Not equal */

return FALSE;

}

return TRUE;

}

int GetCharsLength(const char* chars)

{

int len=0;

while(*chars!='')/* Not '' */

{

++len;

++chars;

}

return len;

}

int main()

{

String str,sub_str,concat_str;

CreateString(&str,"Yannis");

printf("String: ");

PrintlnString(&str);

printf("String Length: %dn",StringLength(&str));

printf("String Empty: %d (true:1,false:0)n",StringEmpty(&str));

printf("Substring from 1 to 4: ");

if(SubString(&str,1,4,&sub_str))

PrintlnString(&sub_str);

printf(""Yannis" contains "anni": %dn",Contains(&str,&sub_str));

printf("Index of sub-string "anni": %d (brute force method)n",Index(&str,&sub_str,0));

printf("Concat "Yannis" and "anni": ");

Concat(&concat_str,&str,&sub_str);

PrintlnString(&concat_str);

printf("Clear concated string: ");

Clear(&concat_str);

PrintlnString(&concat_str);

printf("Compare: "Yannis" with "anni"(EQ=0,LT<0,MT>0): %dn",Compare(&str,&sub_str));

printf("Fetch char: %cn",CharAt(&str,1));

printf("First index of 'n': %dn",FirstIndexOf(&str,'n'));

printf("Last index of 'n': %dn",LastIndexOf(&str,'n'));

printf("SetCharAt 5: (old:%c,new:%c): ",SetCharAt(&str,5,'o'),'o');

PrintlnString(&str);

printf("ReplaceFirst: (old:%c,new:%c): ",ReplaceFirst(&str,'w'),'w');

PrintlnString(&str);

printf("ReplaceLast: (old:%c,new:%c): ",ReplaceLast(&str,'s'),'s');

PrintlnString(&str);

printf("ReplaceAll: (old:%c,new:%c),%d characters placed: ",'n','t',ReplaceAll(&str,'n','t'));

PrintlnString(&str);

printf("ToUpperCase: ");

ToUpperCase(&str);

PrintlnString(&str);

printf("ToLowerCase: ");

ToLowerCase(&str);

PrintlnString(&str);

printf("Start with "wat": %dn",StartWith(&str,"wat"));

printf("End with "is": %dn",EndWith(&str,"is"));

return 0;

}