Basic Arithmetic Operations in C

Summary: This simple C program reads two integers and two floating-point numbers from the user, then computes and displays their sums and differences. It demonstrates formatted I/O and type-specific arithmetic.

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

int main()
{
    int a, b;
    float x, y;

    // Read two integers
    scanf("%d %d", &a, &b);

    // Read two floats
    scanf("%f %f", &x, &y);

    // Print sum and difference of integers
    printf("%d %d\n", a + b, a - b);

    // Print sum and difference of floats (rounded to 1 decimal place)
    printf("%.1f %.1f\n", x + y, x - y);

    return 0;
}

Explanation:

Variable Types:
The program uses int for integer values and float for decimal values, demonstrating basic data types in C.

User Input:
The scanf() function is used to read values from the standard input. %d reads integers and %f reads floats.

Arithmetic Operations:
Basic arithmetic operators + (addition) and - (subtraction) are used to calculate the sum and difference of both integer and float variables.

Formatted Output:
The printf() function is used to print results. For float values, %.1f is used to limit output to 1 decimal place.

Precision Handling:
Using %.1f ensures consistent float formatting which is essential in many real-world applications like billing or reporting.

Header Files:
Although not all included headers are needed here (string.h, math.h, stdlib.h), stdio.h is essential for input/output functions like scanf and printf.