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- Question
What will be the output of the program If characters 'a', 'b' and 'c' enter are supplied as input?
#include<stdio.h> int main() { void fun(); fun(); printf("\n"); return 0; } void fun() { char c; if((c = getchar())!= '\n') fun(); printf("%c", c); }
Options- A. abc abc
- B. bca
- C. Infinite loop
- D. cba
- Correct Answer
- cba
ExplanationStep 1: void fun(); This is the prototype for the function fun().Step 2: fun(); The function fun() is called here.
The function fun() gets a character input and the input is terminated by an enter key(New line character). It prints the given character in the reverse order.
The given input characters are "abc"
Output: cba
Strings problems
Search Results
- 1. What will be the output of the program?
#include<stdio.h> int main() { static char s[25] = "The cocaine man"; int i=0; char ch; ch = s[++i]; printf("%c", ch); ch = s[i++]; printf("%c", ch); ch = i++[s]; printf("%c", ch); ch = ++i[s]; printf("%c", ch); return 0; }
Options- A. hhe!
- B. he c
- C. The c
- D. Hhec Discuss
Correct Answer: hhe!
- 2. What will be the output of the program?
#include<stdio.h> int main() { char *names[] = { "Suresh", "Siva", "Sona", "Baiju", "Ritu"}; int i; char *t; t = names[3]; names[3] = names[4]; names[4] = t; for(i=0; i<=4; i++) printf("%s,", names[i]); return 0; }
Options- A. Suresh, Siva, Sona, Baiju, Ritu
- B. Suresh, Siva, Sona, Ritu, Baiju
- C. Suresh, Siva, Baiju, Sona, Ritu
- D. Suresh, Siva, Ritu, Sona, Baiju Discuss
Correct Answer: Suresh, Siva, Sona, Ritu, Baiju
Explanation:
Step 1: char *names[] = { "Suresh", "Siva", "Sona", "Baiju", "Ritu"}; The variable names is declared as an pointer to a array of strings.Step 2: int i; The variable i is declared as an integer type.
Step 3: char *t; The variable t is declared as pointer to a string.
Step 4: t = names[3]; names[3] = names[4]; names[4] = t; These statements the swaps the 4 and 5 element of the array names.
Step 5: for(i=0; i<=4; i++) printf("%s,", names[i]); These statement prints the all the value of the array names.
Hence the output of the program is "Suresh, Siva, Sona, Ritu, Baiju".
- 3. What will be the output of the program?
#include<stdio.h> int main() { printf("India", "CURIOUSTAB\n"); return 0; }
Options- A. Error
- B. India CURIOUSTAB
- C. India
- D. CURIOUSTAB Discuss
Correct Answer: India
Explanation:
printf("India", "CURIOUSTAB\n"); It prints "India". Because ,(comma) operator has Left to Right associativity. After printing "India", the statement got terminated.- 4. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { char str1[5], str2[5]; int i; gets(str1); gets(str2); i = strcmp(str1, str2); printf("%d\n", i); return 0; }
Options- A. Unpredictable integer value
- B. 0
- C. -1
- D. Error Discuss
Correct Answer: Unpredictable integer value
Explanation:
gets() gets collects a string of characters terminated by a new line from the standard input stream stdin.The gets(str1) read the input string from user and store in variable str1.
The gets(str2) read the input string from user and store in variable str2.
The code i = strcmp(str1, str2); The strcmp not only returns -1, 0 and +1, but also other negative or positive values. So the value of i is "unpredictable integer value".
printf("%d\n", i); It prints the value of variable i.
- 5. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { char str[] = "India\0\CURIOUSTAB\0"; printf("%s\n", str); return 0; }
Options- A. CURIOUSTAB
- B. India
- C. India CURIOUSTAB
- D. India\0CURIOUSTAB Discuss
Correct Answer: India
Explanation:
A string is a collection of characters terminated by '\0'.Step 1: char str[] = "India\0\CURIOUSTAB\0"; The variable str is declared as an array of characters and initialized with value "India"
Step 2: printf("%s\n", str); It prints the value of the str.
The output of the program is "India".
- 6. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { char sentence[80]; int i; printf("Enter a line of text\n"); gets(sentence); for(i=strlen(sentence)-1; i >=0; i--) putchar(sentence[i]); return 0; }
Options- A. The sentence will get printed in same order as it entered
- B. The sentence will get printed in reverse order
- C. Half of the sentence will get printed
- D. None of above Discuss
Correct Answer: The sentence will get printed in reverse order
- 7. What will be the output of the program?
#include<stdio.h> #include<string.h> int main() { printf("%c\n", "abcdefgh"[4]); return 0; }
Options- A. Error
- B. d
- C. e
- D. abcdefgh Discuss
Correct Answer: e
Explanation:
printf("%c\n", "abcdefgh"[4]); It prints the 5 character of the string "abcdefgh".Hence the output is 'e'.
- 8. What will be the output of the program?
#include<stdio.h> int main() { char str[25] = "CuriousTab"; printf("%s\n", &str+2); return 0; }
Options- A. Garbage value
- B. Error
- C. No output
- D. diaCURIOUSTAB Discuss
Correct Answer: Garbage value
Explanation:
Step 1: char str[25] = "CuriousTab"; The variable str is declared as an array of characteres and initialized with a string "CuriousTab".Step 2: printf("%s\n", &str+2);
=> In the printf statement %s is string format specifier tells the compiler to print the string in the memory of &str+2
=> &str is a location of string "CuriousTab". Therefore &str+2 is another memory location.
Hence it prints the Garbage value.
- 9. What will be the output of the program (Turbo C in 16 bit platform DOS)?
#include<stdio.h> #include<string.h> int main() { char *str1 = "India"; char *str2 = "CURIOUSTAB"; char *str3; str3 = strcat(str1, str2); printf("%s %s\n", str3, str1); return 0; }
Options- A. CuriousTab India
- B. CuriousTab CuriousTab
- C. India India
- D. Error Discuss
Correct Answer: CuriousTab CuriousTab
Explanation:
It prints 'CuriousTab CuriousTab' in TurboC (in 16 bit platform).It may cause a 'segmentation fault error' in GCC (32 bit platform).
- 10. What will be the output of the program?
#include<stdio.h> int main() { int i; char a[] = "\0"; if(printf("%s", a)) printf("The string is not empty\n"); else printf("The string is empty\n"); return 0; }
Options- A. The string is not empty
- B. The string is empty
- C. No output
- D. 0 Discuss
Correct Answer: The string is empty
Explanation:
The function printf() returns the number of charecters printed on the console.Step 1: char a[] = '\0'; The variable a is declared as an array of characters and it initialized with "\0". It denotes that the string is empty.
Step 2: if(printf("%s", a)) The printf() statement does not print anything, so it returns '0'(zero). Hence the if condition is failed.
In the else part it prints "The string is empty".
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- 1. What will be the output of the program?