Question

How to use atoll() to convert a string to long long integer in C

Answer 1

#include <stdlib.h>
#include <stdio.h>

int main(void)
{
    const char str[32] = "99999876336219";

    long long int val = atoll(str);

    printf("val = %lld", val);

    return 0;
}




/*
run:

val = 99999876336219

*/

 

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Answer 2

#include <stdlib.h>
#include <stdio.h>
 
int main(void)
{
    printf("atoll(\"9876743843434998\") = %lld", atoll("9876743843434998"));

    return 0;
}
  


/*
run:
 
atoll("9876743843434998") = 9876743843434998

*/

 

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Answer 3

#include <stdlib.h>
#include <stdio.h>
 
int main(void)
{
    printf("%lld\n", atoll("12345"));
    printf("%lld\n", atoll(" 12345"));
    printf("%lld\n", atoll("012345"));
    printf("%lld\n", atoll(" 12345XYZ"));
    
    return 0;
}
  


/*
run:
 
12345
12345
12345
12345

*/

 

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