/* Converts a numeric string to integer
and then to double. Demonstrates the use
of atoi() and atof().
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
char word[80];
puts("\nEnter an integer string: ");
gets(word);
/* atoi() : converts its argument, a series
of numbers used as a string, in to an
integer value and returns it. The
statement after the conversion statement
shows how unsigned long i has been
converted and can now be used.
*/
unsigned long i = atoi(word);
printf("\nThe string '%s' converted
to integer is %u.\n", word, i);
printf("The converted string squared »
is %u.\n", i * i);
/* atol(): converts its string argument to a
* double value. The statement following »
the conversion
* shows how it can be used.
*/
double f = atol(word);
printf("\nThe string '%s' converted to double
is %.2f.\n", word, f);
printf("The converted string divided by 3
is %.3f.\n\n", f / 3);
/* play and enjoy! */
system("PAUSE");
return 0;
}
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