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  1. #include <stdio.h>
  2. int main() {
  3.   int a,i=0;
  4.   printf("One integer please:");
  5.   scanf("%d",&a);
  6.   printf("\n");
  7.   while(a>1) {
  8.     if(a%2) a=3*a+1;
  9.     else a=a/2;
  10.     i++;
  11.     printf("a=%d\n",a);
  12.   }
  13.   printf("\n  %d iterations\n",i);
  14.   return 0;
  15. }
stdin
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7
compilation info 
prog.c: In function ‘main’:
prog.c:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result
stdout
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One integer please:
a=22
a=11
a=34
a=17
a=52
a=26
a=13
a=40
a=20
a=10
a=5
a=16
a=8
a=4
a=2
a=1

  16 iterations
https://ideone.com/NrcJZ
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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