Write a C program to accept string from user and display alternate character of string in upper case .(eg: I/P hello O/P hElLo)

#include<stdio.h>

#include<conio.h>

void  main()

{

            char str[30];

            int i;

            clrscr();

            printf("\n enter the string");

            gets(str);

    for(i = 0; str[i] != 0; i++)

    {

        if( (i % 2) == 0)

            str[i] = tolower(str[i]);

        else

            str[i] = toupper(str[i]);

    }

    printf("%s\n", str);

getch();

}

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