atoi c

Parses the C-string str interpreting its content as an integral number

If the converted value would be out of the range of representable
values by an int, it causes undefined behavior.

/* atoi example */
#include <stdio.h>      /* printf, fgets */
#include <stdlib.h>     /* atoi */

int main ()
{
  int i;
  char buffer[256];

  printf ("Enter a number: ");
  fgets (buffer, 256, stdin);
  i = atoi (buffer);
  printf ("The value entered is %d. Its double is %d.\n",i,i*2);
  return 0;
}

	
/* Output */

Enter a number: 73
The value entered is 73. Its double is 146.

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4.2

Awgiedawgie 440215 points

                                    #include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;string.h&gt;

//CONVERT STRING TO INT

int main () {
   int val;
   char str[20];
   
   strcpy(str, &quot;98993489&quot;);
   val = atoi(str);
   printf(&quot;String value = %s, Int value = %d\n&quot;, str, val);

   strcpy(str, &quot;tutorialspoint.com&quot;);
   val = atoi(str);
   printf(&quot;String value = %s, Int value = %d\n&quot;, str, val);

   return(0);
}

Thank you! 5

4.2 (5 Votes)

3.75

Awgiedawgie 440215 points

                                    #include &lt;stdlib.h&gt; //atoi's library
#include &lt;stdio.h&gt;

int main (void)
{
	string input = &quot;9&quot;;
  
  	int output = atoi(input);
  
  	printf(&quot;%i&quot;, output);
  
  	//this will print out 9 as an int not a string
}

Thank you! 4

3.75 (4 Votes)

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