C Tutorial/stdlib.h/atol

atol

Item Value Header file stdlib.h Declaration long int atol(const char *str); Function converts the string into a long int value.

<source lang="cpp">#include <stdlib.h>

 #include <stdio.h>
 int main(void)
 {
   char num1[80], num2[80];
   printf("Enter first: ");
   gets(num1);
   printf("Enter second: ");
   gets(num2);
   printf("The sum is: %ld.", atol(num1)+atol(num2));
   return 0;
 }</source>