>881
こんな感じ？
unsigned long maxCounter = 0;
int max;
int no, n2;

for (no = 2; no <= 10; no++) {
unsigned long counter = 0;
n2=no;
while( n2 > 1){
counter++;
if( n2 % 2 == 0 ) {
n2 /= 2;
}else{
n2 = n2*3+1;
}
}
if(maxCounter<counter){
maxCounter=counter;
max=no;
}
}
printf(">> %d no keisan kaisuu ha %lu desu\n", max, maxCounter);