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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int ex_ten(int i) {
return pow(10,i);
}
int _digit_count(int num) {
for ( int i = 1; ; i++) {
if (num < ex_ten(i) )
return i;
}
}
int main() {
int num,rev_num = 0;
printf("Please put a num: ");
scanf("%d",&num);
int digit_count = _digit_count(num) ;
int former = 0;
for (int i = 1; i <= digit_count ; i++) {
int temp;
temp = num % ex_ten(i) - former;
former += temp;
temp /= ex_ten(i-1);
rev_num += temp * (ex_ten(digit_count - i));
}
printf("%d\n",rev_num);
}
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