JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD MCA 2018 COMPUTER PROGRAMMING USING C Previous Question Paper (January - 2018 - R15)

The formula to convert Fahrenheit (F) to Celsius (C) is C = (F - 32) * 5 / 9.

#include <stdio.h>
int main() {
    float f, c;
    printf("Enter temperature in Fahrenheit: ");
    scanf("%f", &f);
    c = (f - 32) * 5 / 9;
    printf("Celsius: %.2f\n", c);
    return 0;
}

A recursive function is a function that calls itself to solve a smaller instance of the same problem. It requires a base case to terminate the recursion.

Example: Calculating factorial of n.

int fact(int n) {
    if (n == 0) return 1;
    return n * fact(n - 1);
}

Limitations: Recursive functions consume significant stack memory for each call, which can lead to stack overflow errors if the depth is too large. They are also generally slower than iterative solutions due to function call overhead.