Library Functions - General Questions

What will be the output of the program?

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

int main(void) {
    printf("%d\n", abs(-7) + abs(7));
    return 0;
}

What will be the output of the program?

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

int main(void) {
    printf("%ld\n", strtol("ff", NULL, 16));
    return 0;
}

What will be the output of the program?

#include <stdio.h>
#include <string.h>

int main(void) {
    char s[10];
    memset(s, '*', 3);
    s[3] = '\0';
    printf("%s\n", s);
    return 0;
}

Which function terminates the program immediately with a status code?

What will be the output of the program?

#include <stdio.h>
#include <math.h>

int main(void) {
    printf("%.0f %.0f\n", ceil(2.1), floor(2.9));
    return 0;
}