Sum of Digits - Row Pattern

#include<stdio.h>
#include <stdlib.h>

int main()
{
char s[100],t[100];
int i,count,x=0,j,sum=0;
scanf("%s %s",s,t);
count=atoi(s);
for(i=0;i<atoi(t);i++,printf("\n")){
for(j=0;j<count;j++){
sum+=(s[x]-'0');
printf("%c",s[x++]);
if(x>strlen(s)-1)
x=0;
}
x=0;
memset(s,'\0',sizeof(s));
sprintf(s,"%d",sum);
sum=0;
}


}