atoi c 2b 2b

1Parses the C-string str interpreting its content as an integral number
2
3If the converted value would be out of the range of representable
4values by an int, it causes undefined behavior.
5
6/* atoi example */
7#include <stdio.h>      /* printf, fgets */
8#include <stdlib.h>     /* atoi */
9
10int main ()
11{
12  int i;
13  char buffer[256];
14
15  printf ("Enter a number: ");
16  fgets (buffer, 256, stdin);
17  i = atoi (buffer);
18  printf ("The value entered is %d. Its double is %d.\n",i,i*2);
19  return 0;
20}
21
22	
23/* Output */
24
25Enter a number: 73
26The value entered is 73. Its double is 146.
27

1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4
5//CONVERT STRING TO INT
6
7int main () {
8   int val;
9   char str[20];
10   
11   strcpy(str, "98993489");
12   val = atoi(str);
13   printf("String value = %s, Int value = %d\n", str, val);
14
15   strcpy(str, "tutorialspoint.com");
16   val = atoi(str);
17   printf("String value = %s, Int value = %d\n", str, val);
18
19   return(0);
20}