Sum of the digits of n is substring of n: Difference between revisions
Sum of the digits of n is substring of n (view source)
Revision as of 12:49, 15 April 2021
, 3 years agoAdd C
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903 913 923 933 943
953 963 973 983 993</pre>
=={{header|C}}==
<lang c>#include <stdio.h>
#include <string.h>
int digitSum(int n) {
int s = 0;
do {s += n % 10;} while (n /= 10);
return s;
}
int digitSumIsSubstring(int n) {
char s_n[32], s_ds[32];
sprintf(s_n, "%d", n);
sprintf(s_ds, "%d", digitSum(n));
return strstr(s_n, s_ds) != NULL;
}
int main() {
int i;
for (i=0; i<1000; i++)
if (digitSumIsSubstring(i))
printf("%d ",i);
printf("\n");
return 0;
}</lang>
{{out}}
<pre>0 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 109 119 129 139 149 159 169 179 189 199 200 300 400 500 600 700 800 900 910 911 912 913 914 915 916 917 918 919</pre>
=={{header|Factor}}==
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