#include #include #include #include ///No arquivo .h typedef
struct SString *String; /*String inicString (char *str); void
destroiString (String s); char ler_pos (String str,unsigned pos);
void escrever_pos (String str,unsigned pos,char c);*/ ///No arquivo
.c struct SString { char *text; unsigned tam;}; String inicString
(char *str) { String resp=(String)malloc(sizeof(struct SString));
if (resp) { resp->tam=strlen(str); resp->text=(char
*)malloc(resp->tam+1); if (resp->text)
strcpy(resp->text,str); else { free(resp); resp=NULL; } } return
resp; } void destroiString(String s) { free(s->text); free(s); }
char ler_pos (String str,unsigned pos) { assert(str);
assert(str->text); assert(postam)); return (str->text)[pos];
} void escrever_pos (String str,unsigned pos,char c) { assert(str);
assert(str->text); assert(postam)); (str->text)[pos]=c; }
String duplicastr (String str) { assert(str);return
inicString(str->text); } String atribuistr (String str,String
str2) { assert (str && str2); str->text=(char
*)realloc(str->text,str2->tam+1); if (str->text) {
str->tam=str2->tam; strcpy(str->text,str2->text); }
else { free(str); str=NULL; } return str; } String concatenastr
(String str,String str2) { assert (str && str2);
str->text=(char *)realloc(str->text,str->tam+1); if
(str->text) { str->tam+=str2->tam;
strcat(str->text,str2->text); } else { free(str); str=NULL; }
return str; } int main() { unsigned pos=4; char c='v'; String
s=inicString("Girafa"); String z=inicString("a ve");
assert(!strcmp(s->text,"Girafa")); assert(!strcmp(z->text,"a
ve")); assert(ler_pos(s,pos)=='f'); escrever_pos(s,pos,c);
assert(ler_pos(s,pos)=='v');
assert(!strcmp(duplicastr(s)->text,"Girava")); atribuistr(s,z);
assert(!strcmp(s->text,z->text)); printf("ANTES:\ns = %s\nz =
%s\n\n",s->text,z->text); ///Apenas para teste
concatenastr(s,z); printf("DEPOIS:\ns = %s\nz =
%s\n\n",s->text,z->text); ///Apenas para teste
assert(!strcmp(s->text,"a vea ve")); destroiString(s);
destroiString(z); return 0; }
