Logic development

1. LOGIC DEVELOPMENT
CONTROL FLOW ANALYSIS & C BASICS

2. 1.FIND THE PATTERN!
• n = input (“Enter a positive integer”)
• while n > 0
• c = n
• while c > 0
• print n
• c = c – 1
• end
• n = n - 1
• print newline
• end

3. Ans : 1
• Input : n=5;
• Output:
• 55555
• 4444
• 333
• 22
• 1

4. 2.FIND THE OUTPUT!
• int main() {
• int a[5] = {5, 1, 15, 20, 25};
• int i, j, m;
• i = ++a[1];
• j = a[1]++;
• m = a[i++];
• printf("%d, %d, %d", i, j, m);
• return 0;
• }

5. Ans : 2
• OUTPUT : 2,2,3
• Solution:
• A[1]=1;
• A[1]=2;
• i=2;
• J=2
• A[1]=3;
• i=3
• M=A[3]=15

6. 3.FIND THE OUTPUT!
• int main() {
• int i = 1;
• switch(i) {
• printf("Hellon");
• case 1: printf("Hin");
• break;
• case 2: printf("nByen");
• break;
• }
• return 0;
• }

7. Ans : 3
• OUTPUT: Hi
• Solution: Switch uses concept of label;

8. 4.FIND THE OUTPUT!
• int main() {
• char str[]="C-program";
• int a = 5;
• printf(a >10?"Psn":"%sn", str);
• return 0;
• }

9. Ans : 4
• OUTPUT : C-program

10. 5.FIND THE OUTPUT!
What will be the output of the program (sample.c) given below if it is
executed from the command line?
cmd> sample monday tuesday wednesday thursday
/* sample.c */
#include<stdio.h>
int main(int argc, char *argv[]) {
while(--argc>0)
printf("%s", *++argv);
return 0;
}

11. ANS : 5
• OUTPUT :

12. 6. What does fp points to?
• int main() {
• FILE *fp;
• fp=fopen("trial", "r");
• return 0;
• }

13. ANS : 6

14. 7.FIND THE OUTPUT!
• int main() {
• char str[] = "peace";
• char *s = str;
• printf("%sn", s++ +3);
• return 0;
• }

15. ANS : 7
• OUTPUT : ce

16. 8.FIND THE OUTPUT!
• int main() {
• int *p;
• p = (int *)malloc(20);
• printf("%dn", sizeof(p));
• free(p);
• return 0;
• }

17. ANS : 8
• OUTPUT : 4

18. 9.FIND THE OUTPUT!
What will be the output of the program (sample.c) given below if it is
executed from the command line?
cmd> sample friday tuesday sunday
/* sample.c */
#include<stdio.h>
int main(int argc, char *argv[]) {
printf("%c", *++argv[2] );
return 0;
}

19. ANS: 9
• OUPUT : u
• SOLUTION: argv[2]= Tuesday
• ++ argv[2] =uesday;
• %c of ++argv[2] = u

20. 10.FIND THE OUTPUT!
• int main() {
• short int i = 0;
• for(i<=5 && i>=-1; ++i; i>0)
• printf("%u,", i);
• return 0;
• }

21. 11.FIND THE OUTPUT!
• int main() {
• int y=128;
• const int x=y;
• printf("%dn", x);
• return 0;
• }

22. ANS : 11
• OUTPUT : 128

23. 12.FIND THE OUTPUT!
• int main() {
• struct emp {
• char n[20];
• int age;
• };
• struct emp e1 = {"Dravid", 23};
• struct emp e2 = e1;
• if(e1 == e2)
• printf("The structure are equal");
• return 0;
• }

24. ANS :12
• OUTPUTS NOTHING;
• Error occurs at run time..! Struct data structures cannot be
compared using ‘==‘ Operator

25. 13.FIND THE OUTPUT!
• int main() {
• printf(5+"IndiaBIXn");
• return 0;
• }

26. ANS : 13
• OUTPUT : BIX