Simple C language example (code comment)

/** sum9-2-sumary how many digit from 1 to 100 ** Author: Li Ming 
  
    * creat data: * Revision 1.1 * + debug printf */# include 
   
    /** count-conut how many digit in num * @ num: the number from 1 to 100 * @ digit: digit can Bi ,..... 9 ** return value: the counter of digit in this Num */INT count (INT num, int digit) {int cunter = 0; Do {If (nub % 10 = digit) Counter ++; num/= 10;} while (num! = 0); return counter;} int main (void) {int I = 0; int sum = 0;/* The sumary of 9 */INT max = 0; /* The Max number to count */printf ("sumary 9 from 1 to 100 \ n"); scanf ("% d", & MAX ); /* sumary 9 from 0 to Max */for (I = 0; I <= max; I ++) {sum + = count (I, 9 );} printf ("sum = % d \ n", sum); Return 0 ;}
   
  

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