C Programming. Program to find area and circumference using function.

 Program to find area and circumference using function.

// Program to find area and circumference using function

#include <stdio.h>

float Area(int);

float Circ(int);

int main()

{

    int r;

    float area, circ;

    printf("Enter the radius of a circle : ");

    scanf("%d", &r);

    area = Area(r);

    circ = Circ(r);

    printf("The area of the circle is : %.2f", area);

    printf("\nThe circumference of the circle is : %.2f", circ);

    return 0;

}

float Area(int r)

{

    float area = 3.141 * r * r;

    return area;

}

float Circ(int r)

{

    float circ = 2 * 3.141 * r;

    return circ;

}

Output :

Enter the radius of a circle : 5 The area of the circle is : 78.53 The circumference of the circle is : 31.41

C Programming. Palindrome function.

Palindrome Function.

Function to check if a string is Palindrome or not.

#include<stdio.h>

void isPalindrome(char str[]);

   

int main(){

    char str[100];

    printf("Enter a string : ");

    gets(str);

    isPalindrome(str);

    return 0;

}

void isPalindrome(char str[]){

    char rev[100];

   

    int c=0,i,id=0;

    for (i=0; str[i]!='\0'; i++){

        c++;

    }

    for (i=c-1; i>=0; i--){

        rev[id]=str[i];

        id++;

    }

    c=0;

    for (i=0; str[i]!='\0'; i++){

        if (rev[i]==str[i]){

            c++;

        }

    }

    if (c==i){

        printf("Palindrom");

    }

    else{

        printf("Not Palindrom");

    }

}