fork(1) download

#include <stdio.h>
 
int digits(long n);
 
int solve(const long n) {
 
  long count[5], max=0;
  count[0]=n/2+0.5;
 
 /* for(count[1]=1;count[1]<=count[0];count[1]++){
    
    if((digits(count[1])+digits(n-count[1]))>max) 
      max=(digits(count[1])+digits(n-count[1]));
    
  }*/
  count[1]=n;
  count[2]=0;
  while(count[1]>9){
    count[1]/=10;
    count[2]++;
  }
  count[3]=pow(10,count[2]);
  max=digits(count[3]-1)+digits(n-count[3]+1);
 
  printf("n = %ld, max = %ld\n", n, max);
  return (int)max;
 
}
int digits(long n){
  long digit=0;
  while(n>9){
    digit+=n%10;
    n/=10;
  }
  return digit+n;
}

prog.c: In function ‘solve’:
prog.c:22:12: warning: implicit declaration of function ‘pow’ [-Wimplicit-function-declaration]
   count[3]=pow(10,count[2]);
            ^~~
prog.c:22:12: warning: incompatible implicit declaration of built-in function ‘pow’
prog.c:22:12: note: include ‘<math.h>’ or provide a declaration of ‘pow’
prog.c:2:1:
+#include <math.h>
 
prog.c:22:12:
   count[3]=pow(10,count[2]);
            ^~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status

Standard output is empty