Sum of Two Numbers in C using Function | Pointers | Array | Recursion

Sum of two numbers in C using function, pointers, array, and recursion.

In this article, you will learn how to find sum of two numbers in c using function, pointers, array, and recursion with and without minimum variables.

 

Example

 

You should have knowledge of the following topics in c programming to understand this program:

• C main() function
• C printf() function
• C Data Types
• C Functions
• C Pointers
• C Array
• C For loop

 

In this article, we solved this problem in six methods:

1. Using the normal calculation
2. With minimum variable
3. Using the Function
4. Using the Pointers
5. Using the Array
6. Using the Recursion

Sum of Two Numbers in C Program

// Sum of Two Numbers in C Program
#include <stdio.h>

int main() {
    int p, q, r;
    
    printf("Enter two integer values::\n\n");
    scanf("%d %d", &p, &q);

    // calculating sum
    r = p + q;      
    
    printf("Result:: %d + %d = %d\n", p, q, r);
    return 0;
}

Run Program

Output

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Sum of Two Numbers in C with Minimum Variable

// Sum of Two Numbers in C with Minimum Variable
#include <stdio.h>

int main() {
    int p, q;
    
    printf("Enter two integer values::\n\n");
    scanf("%d %d", &p, &q);
    
    printf("Result:: %d + %d = ", p, q);
    
    // calculating sum
    p = p + q;
    
    printf("%d\n", p);
    return 0;
}

Run Program

Output

 

Explanation

In this given program, we have taken inputs 12 and 22 from the user then we applied arithmetic to make a sum on these values.

Then this will return the 34 the final output of the above calculation.

---

Sum of Two Numbers in C using Function

// Sum of Two Numbers in C using Function
#include <stdio.h>

// This function will return sum of two integer numbers
int Sum(int a, int b) {
    return a + b;
}

// It's the driver function
int main() {
    int p, q;
    
    printf("Enter two integer values::\n");
    scanf("%d %d", &p, &q);
    
    printf("Result:: %d + %d = %d\n", p, q, Sum(p, q));
    return 0;
}

Run Program

 

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C Program to Find Sum of N Numbers using For loop

Sum of Digits of a Number in C using While loop

C Program to Find Sum of Natural Numbers using Recursion

---

Sum of Two Numbers in C using Pointers

// Sum of Two Numbers in C using Pointers
#include <stdio.h>

int main() {
    int p, q, r;
    int *a, *b;
    
    printf("Enter two integer values::\n");
    scanf("%d %d", &p, &q);

    // To get the address of `p` and `q` variable
    a = &p;
    b = &q;

    // calculating sum
    r = *a + *b;
    
    printf("Result:: %d + %d = %d\n", *a, *b, r);
    return 0;
}

Run Program

---

Sum of Two Numbers in C using Array

// Sum of Two Numbers in C using Array
#include <stdio.h>

int main() {
    int sum = 0, s = 0;
    
    printf("Enter the number of inputs: ");
    scanf("%d", &s);

    // To store the numbers
    int numbers[s];

    // To store the input values into the Array
    printf("\nEnter the %d integer values:\n", s);
    for (int i = 0; i < s; i++) {
        scanf("%d", &numbers[i]);
        sum += numbers[i];
    }
    
    // Final output
    printf("\nResult:: ");
    for (int i = 0; i < s; i++) {
        printf("%d", numbers[i]);
        if (i < s - 1)
            printf(" + ");
    }
    printf(" = %d\n", sum);
    return 0;
}

Run Program

---

Sum of Two Numbers in C using Recursion

// Sum of Two Numbers in C using Recursion
#include <stdio.h>
int sum;

// This function will return sum of two integer numbers
int Sum(int a, int b) {
    if (b == 0)
        return a;

    // Recursion: adding 1, N times and, then at the end adding m to it
    sum = Sum(a, b - 1) + 1;
    return sum;
}

// It's the driver function
int main() {
    int p, q;
    
    printf("Enter two integer values::\n");
    scanf("%d %d", &p, &q);
    
    printf("Result:: %d + %d = %d\n", p, q, Sum(p, q));
    return 0;
}

Run Program

Output

 

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Sum of Two Float Numbers in C Program

// Sum of Two Float Numbers in C Program
#include <stdio.h>

int main() {
    float p, q;
    
    printf("Enter two float values::\n\n");
    scanf("%f %f", &p, &q);
    
    printf("Result:: %f + %f = ", p, q);
    
    // calculating sum
    p = p + q;
    
    printf("%f\n", p);
    return 0;
}

Run Program

Output

 

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