字符转数字

uint32_t StrToInt(char *a,char len)

{

int i;
 
uint32_t sum;

sum =  a[0] - '0';

i = 1;

while(a[i])

{
 
    sum = sum*10 + a[i]-'0';
 
    i++;

}

return sum;

}

void IntToStr(char *temp,unsigned int SN)
{

char index[10];
int i = 0;

while(i<10)
{
    index[i++] = SN%10+'0';
    SN /= 10;
}
i= 9;
while(i>-1)
{
    temp[9-i] = index[i--];
}

}