# include & ltstdio.h & gt
# include & ltassert.h & gt
# include & ltstring.h & gt
//Now you can add a conversion base radix in the parameter part, and you can convert the remainder for different decimals (only consider the negative sign when radix== 10 at this time).
void my_itoa(char *buffer，const int num)
{
int temp = num，I = 0；
Assertion (buffer! = NULL)；
if(temp & lt； 0)
{
buffer[I]= '-'； //Negative situation
i++；
temp =-temp； //become a positive number, which is convenient for the remainder operation.
}
for(； Temperature; i++)
{
buffer[I]= temp % 10+' 0 '； //Loop the last bit of num and put it in the buffer until 0.
temp/= 10；
}
if(num & lt； 0)
//Non-standard library function, which can realize the flipping of the flipping string by itself (omitted here)
_ strrev(& amp； buffer[ 1])； //If it is negative, only the part after the negative sign will be flipped.
other
_strrev (buffer); //Flip All to flip the flipped string back again.
}
int main(int argc，char *argv[])
{
int a =- 123；
char str[32]= " \ 0 "；
my_itoa(str，a)；
printf("%s\n "，str)；
sprintf(str，" %d "，a)；
printf("%s\n "，str)；
Returns 0;
}