Question

How to find the highest digit in int number with C

Answer 1

#include <stdio.h>
 
int getTheHighestDigit(int n) {
    int max = 0;
    while(n) {
        if (n % 10 > max) max = n % 10;
        n /= 10;
    }
    return max;
}
  
int main(void) {
    int n = 213;
    printf("%d\n", getTheHighestDigit(n));
     
    n = 76594;
    printf("%d\n", getTheHighestDigit(n));
     
    n = 7652;
    printf("%d\n", getTheHighestDigit(n));
     
    return 0;
}
  
  
  
/*
run:
  
3
9
7
  
*/

 

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