int轉string的幾種方法

int sprintf( char *buffer, const char *format [, argument] ... );<stdio.h>例如：int ss;char temp[64];string str;ss = 1000;sprintf(temp, "%d", ss);string s(temp);//調用string的方法cout<<s.c_str()<<endl;//1000cout<<s.size()<<endl;  //長度為42.char *_itoa( int value, char *string, int radix );<stdlib.h>例如：char buffer[20];int  i = 3445;   _itoa( i, buffer, 10 );string s(buffer);3. stringstream( )<sstream.h>例如：int hello=4;stringstream ss;ss<<hello;string   s=ss.str()；//調用string的方法cout<<s.c_str()<<endl;也可以自己寫函數：string int2str(int num) { if(num == 0) return "0"; string str = ""; int num_ = num > 0 ? num : -1 * num; while(num_) { str = (char)(num_ % 10 + 48) + str; num_ /= 10; } if(num < 0) str = "-" + str; return str; }