C/stdlib.h/atoi

atoi: converts the string to an int value

<source lang="cpp">

//Declaration: int atoi(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: %d.", atoi(num1)+atoi(num2));
   return 0;
 }
        

/* Enter first: 3 Enter second: 4 The sum is: 7.*/

      </source>