Integer conversion to string Inttoarray and string to integer Arraytoint implementation

7. Implementation of string itoa for integer loading

1 Char*inttoarray (intNumberChar*str)2 {3     if(str = =NULL)4     {5         returnNULL;6     }7     Char*ret =str;8     Char*left =str;9     Chartemp =' /';Ten     //handling of negative numbers One     if(Number <0) A     { -Number =-Number ; -*ret++ ='-'; theleft++; -     } -     //the number of different bits separated by the 10 method of finding the remainder -      while(Number >0) +     { -*ret++ = number%Ten+'0';//Convert a number to a Ascall code +Number = number/Ten; A     } at*ret =' /'; -ret--; -      -     /*Reverse*/ -      while(Ret >Left ) -     { intemp = *Left ; -*left++ = *ret; to*ret--=temp; +     } -     returnstr; the}

Convert String to Integer arraytoint

consider whether the string is negative, contains letters, and if the converted number overflows, and so on, the processing -123asd455 with letters is -123, andasd122 is treated as 0.

1 intArraytoint (Char*str)2 {3     4     /*idea: Each traversal of a string is empty or the character is the end traversal of the character *10*/5     Long Longval =0;6     intFlag =0;7     Char*SRC =str;8     BOOLminus =false;9     /*Security*/Ten     if(str = =NULL) One     { A         return 0; -     } -     //the handling of positive and negative signs, whether plus or minus, takes a bit to add a pointer to the the     if(*SRC = ='-') -     { -Src++; -minus =true; +     } -     Else if(*SRC = ='+') +     { ASrc++; at     } -      -      while((*src! =' /') && (*SRC-'0'>=0) && (*SRC-'0'<=9))) -     { -         //multiply by bit by ten -Flag = minus? -1:1; inval = val *Ten+ flag* (*SRC-'0'); -         /*handling overflow problem: int max 0x7fffffff min 80000000*/ to         if((minus) && (val >0x7FFFFFFF)) || +(!minus) && (Val < (signedint)0x80000000))) -         { theval =0; *              Break; $         }Panax NotoginsengSrc++; -     } theprintf"val=%d",(int) val*flag); +     return(int) Val; A } the  

Integer conversion to string Inttoarray and string to integer Arraytoint implementation