How to check if a number is Magic Number using C programming Language!

 #include <stdio.h>

#include <math.h>

void main(){

int m,n,o,i,j,sum = 0,total = 0;

scanf("%d",&o);

for(i = o;i>0;i/=10){

m = i % 10;

sum = sum + m;

}

for(j = sum ;j>0;j/=10){

n = j % 10;

total = total + n;

}

if(total == 1){

printf("%d is a Magic Number",o);

}

}