Mastering Input and Output in C Programming

by

Unravel the mysteries of C program output! This guide walks you through input/output functions, format specifiers, debugging tips, and more. Gain control and create clear, user-friendly C applications.

Mastering Input and Output in C Programming

C, a foundational programming language, empowers you to create robust applications. Yet, deciphering program output can sometimes feel like an enigma. This blog post equips you with the knowledge and tools to confidently navigate the world of C program output.

1 / 10

What is the output of the following code

struct Student {
char name[20];
int age;
};
struct Student s1 = { "Alice", 20 };
struct Student s2 = { "Alice", 20 };
if (s1 == s2) {
printf("Equal");
} else {
printf("Not equal");
}

2 / 10

What is the result of the following code

int square(int x) {
return x * x;
}
int main() {
int result = square(5 + 3);
printf("%d", result);
return 0;
}

3 / 10

What will be the output of the following

int matrix[3][3] = { {1, 2, 3}, {4, 5, 6},{7, 8, 9} };
printf("%d", matrix[1][2]);

4 / 10

What is the output of the following code

struct Student {
char name[20];
int age;
};
struct Student s = { "Bob" ,20};
printf("%s %d", s.name, s.age);

5 / 10

What will be the output of the following code?

char str[] = "programming";
printf("%c", str[12]);

6 / 10

What is the output of the following
code

int x = 10;
int *ptr = &x;
printf("%d", *ptr);

7 / 10

What will be the output of the following C code

#include <stdio.h> int main() {

int a = 5, b = 2; float result; result = a / b;

printf("%f", result); return 0; }

8 / 10

What will be the output of the following C code

int main() { int x = 10; int *ptr = &x;

printf("%d", *ptr++); printf("%d", *ptr); return 0; }

9 / 10

What is the output of the following code

struct Flags {
unsigned int isReady : 1;
unsigned int isEnabled : 1;
};
struct Flags flags = { 1, 0 };
printf("%u %u", flags.isReady,
flags.isEnabled);

10 / 10

What is the result of the following code?

int arr[] = {1, 2, 3, 4, 5};
int *ptr = arr;
printf("%d", *ptr);

Your score is

The average score is 0%

0%

Deciphering the output of C programs requires keen insight into its fundamental principles. Key aspects such as operator precedence, increment/decrement operations, pointer arithmetic, integer division, and handling of undefined behavior play pivotal roles. By mastering these concepts, programmers can unravel the mysteries of C output with clarity and precision.

Additional Tips:

  • Practice writing C programs with diverse input and output scenarios.
  • Utilize debuggers to step through your code line by line and observe variable values.
  • Seek help from online communities or experienced C programmers when needed.

Leave a Comment