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MindMap Gallery C Language Question 1-10

C Language Question 1-10

This is a mind map about C language questions 1-10. The main contents include: 10. C language examples - numerical comparison, 9. C language examples - dividing two numbers, 8. C language examples - Characters to ASCII Code, 7. C language example - multiplying two floating point numbers, 6. C language example - adding two numbers, 5. C language example - output double precision numbers, 4. C language example - output floating point numbers, 3. C Language Example - Output List.

Edited at 2025-02-13 20:32:40

Mason·Carter

Recent works View more works>>

C Language Question 1-10

Mason·Carter

Recent works View more works>>

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Outline

C Language Question 11-15
- 19
- 1
Mason·Carter
C Language Question 16-20
- 38
- 1
Mason·Carter

1-10

1. C language example - output "Hello, World!"

#include <stdio.h>

int main()

{

// The string in printf() requires quotation marks

printf("Hello, World!");

return 0;

}

2. C language example - output integers

#include <stdio.h>

int main() {

int number = 10; // Define an integer variable and assign a value of 10

// Use the printf function to output integers

printf("The number is: %d ", number);

return 0; // Return 0 means that the program ends successfully

}

#include <stdio.h>

int main()

{

int number;

// printf() output string

printf("Enter an integer: ");

// scanf() format input

scanf("%d", &number);

// printf() displays formatted input

printf("The integer you enter is: %d", number);

return 0;

}

3. C language example - output single character

#include <stdio.h>

int main()

{

int number;

// printf() output string

printf("Enter an integer: ");

// scanf() format input

scanf("%d", &number);

// printf() displays formatted input

printf("The integer you enter is: %d", number);

return 0;

}

#include <stdio.h>

int main() {

char character = 'A'; // Define a character variable and assign a value to 'A'

character

// Use the printf function to output characters

printf("The character is: %c ", character);

return 0; // Return 0 means that the program ends successfully

}

4. C language example - output floating point numbers

#include <stdio.h>

int main() {

float f; // Declare floating point variable

f = 12.001234; // Define floating point variable

printf("f has the value of %f", f);

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main() {

float f = 12.001234;

printf("f has the value of %f ", f);

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main() {

float f = 12.001234;

printf("f has the value of %e ", f);

In scientific notation,

1.200123e 01

Represents a floating point number, where

Indicates "multiple by a power of 10". Specifically:

1.200123

It is a coefficient.

e 01

Represents a power of 10.

therefore,

1.200123e 01

Equivalent to

1.200123 × 10^1

, the result is

12.00123

Summarize:

1.200123e 01

In-house

Represents a power of 10.

The final value of this expression is

12.00123

If you use it in the code

printf("%e", f);

, the program will output floating point numbers in the form of scientific notation

value. In this example,

The value is

12.001234

, so the output result is

1.200123e 01

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main() {

float f = 12.001234;

printf("f has the value of %g ", f);

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main() {

float f = 12.001234;

printf("f is %.2f ", f); // Keep two decimal places

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main() {

float f = 12.001234;

printf("f is .2f ", f); // Takes a total of 10 characters in width, retaining two decimal places

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main() {

float f = 12.001234;

printf("f has a value of %-10.2f ", f); // Align left, occupying a total of 10 characters in width, retaining two decimal places

return 0;

}

#define _CRT_SECURE_NO_WARNINGS

#include <iostream>

int main() {

float f = 12.001234;

std::cout << "f is " << f << std::endl;

return 0;

}

5. C Language Example - Output Double Precision Number

#include <stdio.h>

int main() {

double d; // Declare double precision variables

d = 12.001234; // Define double precision variable

printf("d has the value of %le", d);

return 0;

}

#include <stdio.h>

int main() {

double d; // Declare double precision variables

d = 12.001234; // Define double precision variable

printf("d has the value of %e", d);

return 0;

}

#include <stdio.h>

int main() {

double d = 12.001234;

printf("d has the value of %f ", d);

return 0;

}

#include <stdio.h>

int main() {

double d = 12.001234;

printf("d has the value of %e ", d);

return 0;

}

#include <stdio.h>

int main() {

double d = 12.001234;

printf("d has the value of %E ", d);

return 0;

}

#include <stdio.h>

int main() {

double d = 12.001234;

printf("d has the value of %g ", d);

return 0;

}

#include <stdio.h>

int main() {

double d = 12.001234;

printf("d has the value of %G ", d);

return 0;

}

#include <stdio.h>

int main() {

double d = 12.001234;

printf("d has the value of %A ", d);

return 0;

}

6. C language example - add up two numbers

#include <stdio.h>

int main()

{

int firstNumber, secondNumber, sumOfTwoNumbers;

printf("Enter two numbers (segmented by space): ");

// Receive two integers input by the user through the scanf() function

scanf("%d %d", &firstNumber, &secondNumber);

// Add two numbers

sumOfTwoNumbers = firstNumber secondNumber;

// Output result

printf("%d %d = %d", firstNumber, secondNumber, sumOfTwoNumbers);

return 0;

}

#include <stdio.h>

int main() {

int firstNumber, secondNumber, sumOfTwoNumbers;

printf("Enter two numbers (segmented by space): ");

/*Receive two integers input by the user through the scanf() function*/

scanf("%d %d", &firstNumber, &secondNumber);

/*Add two numbers*/

sumOfTwoNumbers = firstNumber secondNumber;

/*Output result*/

printf("%d %d = %d ", firstNumber, secondNumber, sumOfTwoNumbers);

return 0;

}

#include <stdio.h>

/*Function declaration*/

void inputNumbers(int* first, int* second);

int addNumbers(int first, int second);

void printResult(int first, int second, int sum);

int main() {

int firstNumber, secondNumber, sumOfTwoNumbers;

/* Enter two numbers*/

inputNumbers(&firstNumber, &secondNumber);

/*Add two numbers*/

sumOfTwoNumbers = addNumbers(firstNumber, secondNumber);

/*Output result*/

printResult(firstNumber, secondNumber, sumOfTwoNumbers);

return 0;

}

#include <stdio.h>

int main() {

int numbers[2], sumOfTwoNumbers;

printf("Enter two numbers (segmented by space): ");

/*Receive two integers input by the user through the scanf() function*/

for (int i = 0; i < 2; i ) {

scanf("%d", &numbers[i]);

}

/*Add two numbers*/

sumOfTwoNumbers = numbers[0] numbers[1];

/*Output result*/

printf("%d %d = %d ", numbers[0], numbers[1], sumOfTwoNumbers);

return 0;

}

#include <stdio.h>

int main() {

int firstNumber, secondNumber;

int* ptrFirst = &firstNumber;

int* ptrSecond = &secondNumber;

int* ptrSum = &sumOfTwoNumbers;

int sumOfTwoNumbers;

printf("Enter two numbers (segmented by space): ");

/*Receive two integers input by the user through the scanf() function*/

scanf("%d %d", ptrFirst, ptrSecond);

/*Add two numbers*/

*ptrSum = *ptrFirst *ptrSecond;

/*Output result*/

printf("%d %d = %d ", *ptrFirst, *ptrSecond, *ptrSum);

return 0;

}

#include <stdio.h>

int main() {

int firstNumber, secondNumber, sumOfTwoNumbers;

int result;

printf("Enter two numbers (segmented by space): ");

/* Use scanf() function to receive two integers input by the user and perform input verification*/

result = scanf("%d %d", &firstNumber, &secondNumber);

if (result != 2) {

printf("Input is invalid, please enter two integers and separate them with spaces. ");

return 1; /*Return error code*/

}

/*Add two numbers*/

sumOfTwoNumbers = firstNumber secondNumber;

/*Output result*/

printf("%d %d = %d ", firstNumber, secondNumber, sumOfTwoNumbers);

return 0;

}

7. C Language Example - Multiplying two floating point numbers

#include <stdio.h>

int main() {

float num1, num2, product;

printf("Please enter the first floating point number: ");

scanf("%f", &num1);

printf("Please enter the second floating point number: ");

scanf("%f", &num2);

product = num1 * num2;

printf("%.2f multiplying by %.2f equals %.2f ", num1, num2, product);

return 0;

}

#include <stdio.h>

int main()

{

double firstNumber, secondNumber, product;

printf("Enter two floating point numbers: ");

// User inputs two floating point numbers

scanf("%lf %lf", &firstNumber, &secondNumber);

// Multiply two floating point numbers

product = firstNumber * secondNumber;

// Output result, %.2lf retains two decimal points

printf("Result = %.2lf", product);

return 0;

}

#include <stdio.h>

int main() {

float num1, num2, product;

printf("Please enter the first floating point number: ");

scanf("%f", &num1);

printf("Please enter the second floating point number: ");

scanf("%f", &num2);

product = num1 * num2;

printf("%.2f multiplying by %.2f equals %.2f ", num1, num2, product);

return 0;

}

#include <stdio.h>

int main() {

double num1, num2, product;

printf("Please enter the first floating point number: ");

scanf("%lf", &num1);

printf("Please enter the second floating point number: ");

scanf("%lf", &num2);

product = num1 * num2;

printf("%.2lf multiplied by %.2lf equals %.2lf ", num1, num2, product);

return 0;

}

#include <stdio.h>

int main() {

long double num1, num2, product;

printf("Please enter the first floating point number: ");

scanf("%Lf", &num1);

printf("Please enter the second floating point number: ");

scanf("%Lf", &num2);

product = num1 * num2;

printf("%.2Lf multiplying by %.2Lf equals %.2Lf ", num1, num2, product);

return 0;

}

8. C Language Example - Character to ASCII Code

#include <stdio.h>

int main()

{

char c;

printf("Enter a character: ");

// Read user input

scanf("%c", &c);

// %d displays integers

// %c displays the corresponding characters

printf("%c's ASCII is %d", c, c);

printf("%c's ASCII is %d", c, (int)c);

return 0;

}

January 29, 2025 00:31:46

good

9. C Language Example - Divide two numbers

#include <stdio.h>

int main() {

int dividend, divisor, quotient, remainder;

printf("Input is divisor: ");

scanf("%d", &dividend);

printf("Input Divider: ");

scanf("%d", &divisor);

// Calculation quotient

quotient = dividend / divisor;

// Calculate the remainder

remainder = divideend % divisor;

printf("quote = %d ", quote);

printf("remain = %d", remainder);

return 0;

}

#include <stdio.h>

int main() {

int dividend, divisor, quotient, remainder;

printf("Input is divisor: ");

scanf("%d", &dividend);

printf("Input Divider: ");

scanf("%d", &divisor);

if (divisor != 0) {

quotient = dividend / divisor;

remainder = divideend % divisor;

printf("quote = %d ", quote);

printf("remain = %d ", remainder);

}

else {

printf("The divisor cannot be zero. ");

}

return 0;

}

#include <stdio.h>

#include <stdlib.h>

int main() {

int dividend, divider;

div_t result;

printf("Input is divisor: ");

scanf("%d", &dividend);

printf("Input Divider: ");

scanf("%d", &divisor);

if (divisor != 0) {

result = div(dividend, divisor);

printf("quot = %d ", result.quot);

printf("remain = %d ", result.rem);

}

else {

printf("The divisor cannot be zero. ");

}

return 0;

}

#include <stdio.h>

int main() {

int dividend, divisor, quotient = 0, remainder;

printf("Input is divisor: ");

scanf("%d", &dividend);

printf("Input Divider: ");

scanf("%d", &divisor);

if (divisor != 0) {

remainder = divide;

while (remainder >= divisor) {

remainder -= divisor;

quotient ;

}

printf("quote = %d ", quote);

printf("remain = %d ", remainder);

}

else {

printf("The divisor cannot be zero. ");

}

return 0;

}

10. C Language Examples - Numerical Comparison

Method 1: Use if - else structure

#include <stdio.h>

int main() {

int a, b, c;

// Enter three integers

printf("Enter the first value: ");

scanf("%d", &a);

printf("Enter the second value: ");

scanf("%d", &b);

printf("Enter the third value: ");

scanf("%d", &c);

// Compare three numbers and output the largest one

if (a > b && a > c)

printf("%d Max ", a);

else if (b > a && b > c)

printf("%d Max ", b);

else if (c > a && c > b)

printf("%d Max ", c);

else

printf("There are two or three values equal ");

return 0;

}

Method 2: Use nested if structure

#include <stdio.h>

int main() {

int a, b, c;

// Enter three integers

printf("Enter the first value: ");

scanf("%d", &a);

printf("Enter the second value: ");

scanf("%d", &b);

printf("Enter the third value: ");

scanf("%d", &c);

// Compare three numbers and output the largest one

if (a >= b) {

if (a >= c)

printf("%d Max ", a);

else

printf("%d Max ", c);

}

else {

if (b >= c)

printf("%d Max ", b);

else

printf("%d Max ", c);

}

return 0;

}

Method 3: Use the max function

#include <stdio.h>

// Define a function that returns the maximum value of two numbers

int max(int x, int y) {

return (x > y) ? x : y;

}

int main() {

int a, b, c;

// Enter three integers

printf("Enter the first value: ");

scanf("%d", &a);

printf("Enter the second value: ");

scanf("%d", &b);

printf("Enter the third value: ");

scanf("%d", &c);

// Use the max function to compare three numbers and output the largest one

int max_value = max(a, max(b, c));

printf("%d Max ", max_value);

return 0;

}

Method 4: Use pointers or arrays

#include <stdio.h>

int main() {

int a, b, c;

int numbers[3];

// Enter three integers

printf("Enter the first value: ");

scanf("%d", &numbers[0]);

printf("Enter the second value: ");

scanf("%d", &numbers[1]);

printf("Enter the third value: ");

scanf("%d", &numbers[2]);

// Initialize the maximum value to the first element

int max_value = numbers[0];

// traverse the array to find the maximum value

for (int i = 1; i < 3; i ) {

if (numbers[i] > max_value) {

max_value = numbers[i];

}

printf("%d Max ", max_value);

return 0;

}

Method 5: Use standard library functions

#include <stdio.h>

#include <stdlib.h>

// Comparison function

int compare(const void* a, const void* b) {

return (*(int*)a - *(int*)b);

}

int main() {

int a, b, c;

int numbers[3];

// Enter three integers

printf("Enter the first value: ");

scanf("%d", &numbers[0]);

printf("Enter the second value: ");

scanf("%d", &numbers[1]);

printf("Enter the third value: ");

scanf("%d", &numbers[2]);

// Use qsort to sort arrays

qsort(numbers, 3, sizeof(int), compare);

// The last element after output sorting, that is, the maximum value

printf("%d Max ", numbers[2]);

return 0;

}