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  1. #include <stdio.h>      /* printf, fgets */
  2.  
  3. int atoi(const char*s){int r,c,a;for(r=0,a=*s==45?s++:0;c=*s++;r=r*10+c-48);return a?-r:r;}
  4.  
  5. int main ()
  6. {
  7.   int i;
  8.   char buffer[256];
  9.   printf ("Enter a number: ");
  10.   fgets (buffer, 256, stdin);
  11.   i = atoi (buffer);
  12.   printf ("The value entered is %d. Its double is %d.\n",i,i*2);
  13.   return 0;
  14. }
  15.  
Success #stdin #stdout 0s 2252KB
comments (?)
stdin
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1234
stdout
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Enter a number: The value entered is 1234. Its double is 2468.
https://ideone.com/zsodr5
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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