Back to General and Gameplay Programming

c prog doubt...

General and Gameplay Programming Programming

Started by qwertyui December 05, 2004 02:09 PM

1 comment, last by Zahlman 19 years, 4 months ago

qwertyui

100

Author

December 05, 2004 02:09 PM

Hi, How can I make a program in c/c++ that takes a number and finds the max and min digit in the number? Thanks

mike25025

494

December 05, 2004 02:15 PM

void findminmax(unsigned int x,int& maxi,int& mini){	char str[32];	sprintf(str,"%d",x);	maxi = 0;	mini = 9;	for(int i=0;i<strlen(str);i++)	{		maxi = max(maxi,str-'0');		mini = min(maxi,str-'0');	}}

Zahlman

1,682

December 05, 2004 08:16 PM

I think it's a fair bit cleaner to do the arithmetic yourself, than to convert back and forth from the ASCII digit range using old C-style hacks (char buffer, sprintf(), strlen):

std::pair<int, int> digitRange(int x) {  // Return value is a pair<min, max>.  std::pair<int, int> limits(9, 0);  int lastDigit;  if (x < 0) x *= -1; // Not sure of div/mod behaviour on negative numbers in C++...  while(x) {    lastDigit = x % 10; x /= 10;    if (lastDigit < limits.first) limits.first = lastDigit;    if (lastDigit > limits.second) limits.second = lastDigit;  }  return limits;}