C program to replace vowels with special characters

Today we will write a program in c in which we will replace all those vowels in string by a special symbol.

If we talk about the strategy of this program, then the strategy is very simple, we will take a string from the user and a special symbol by which we will replace the vowels that given special symbol.

Let's get Started the code...

#include <stdio.h>
#include <conio.h>
int main() {
    char str[100], ch;
    printf("\nEnter the String : ");
    gets(str);
    
    printf("\nEnter Any Symbol which to Replace : ");
    scanf("%c", &ch);
    
    for(int i = 0; str[i] != '\0'; i++){
        if(str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' || str[i] == 'u' || str[i] == 'A' || str[i] == 'E' || str[i] == 'I' || str[i] == 'O' || str[i] == 'U'){
            str[i] = ch;
        }
    }
    
    printf("After Replace : %s", str);

    return 0;
}

/*

Enter the String : lapmos

Enter Any Symbol which to Replace : $
After Replace : l$pm$s

*/

If understand the program in detail...

We have used two libraries in this program which is first library is a standard input out library and second library is console input output library.
Every program has a main function from where all the program start executing.
We declare an array of char datatype and a variable.
Which is called 'str', that is what we will use for this string which will have our string store and the variable called 'ch', we store the special symbol.
Printed a message to the user and got the user to input the stringusing the 'gets()' function.
Input the special symbol in a variable called 'ch'.

Started a for loop whose intial condition i = 0. The condition given to check str[i] != '\n' which means until the string ends and 'i' will be increament by 1 until when the condition become false.
Inside the for loop body we will check the vowels in this string by the if condition statement.
If vowels comes at any place, then we will replace it which given in the special symbol user.
Print the screen replaced at last and the program will terminated.