Re: [Dev-C++] RE : [c-prog] what's wrong with the code

[Daniel K. O. <dan...@ya...>]

Dawood Vora wrote:

> int main()
> {
>   char ch = 'z';
>   string p = ch;
>   /* for the above line the following is the error it gives me :
>  conversion from `char' to non-scalar type 
> `basic_string<char,string_char_traits<char>,__default_alloc_template<false,0>  
> >' requested
>  */ 


Long story short: a string can't be initialized from a 'char' like this.
 From The Man himself (TC++PL 3rd, 20.3.4):

---
void f(char *p, vector<char>& v)
{
    string s0;               // ok: empty
    string s00 = "";      //  ok: empty too

    string s1 = 'a';       // error
    string s2 = 7;         // error
    string s3 (7);         // error
    srtring s4(7, 'a');   // OK: s4 = "aaaaaaa"

    string s5 = "Frodo";   // OK: copy of "Frodo"
    string s6 = s5;            // OK: copy of s5

    string s7(s5, 3, 2);      // OK: s7 = s5[3] and s5[4] = "do"
    string s8(p+7, 3);      // OK: p[7], p[8] and p[9]
    string s9(p, 7, 3);      // OK: string(string(p), 7, 3)
    string s10(v.begin(), v.end());   // OK: copy all chars from v
}
---



>   p.push_back(ch);
>  /* for the above line the following is the error it gives me :
>  no matching function for call to 
> `basic_string<char,string_char_traits<char>,__default_alloc_template<false,0>  
> >::push_back (char &)'
> */


Try:
---
    p+=ch;
---





Daniel K. O.