C/stdlib.h/atoll

atoll: converts *str into a long long int value

<source lang="cpp">

//Declaration: long long int atoll(const char *str);

 #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.", atoll(num1)+atoll(num2));
   return 0;
 }
        

/* Enter first: 1 Enter second: 2 The sum is: 3.

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