The following program converts UPPERCASE string to lowercase. (c++)

The foloowing program converts UPPERCASE string to lowercase.(c++)

#include< iostream.h> 

#include< string.h> 

void StrToLwr(char* mainstring, char *output)

    {

    int Len = strlen(mainstring);  

    for(int i = 0; i < Len; i++) 

        {

        if( (int)mainstring[i] < 65) 

        output[i] = mainstring[i];

        if( (int)mainstring[i] >= 65 && (int)mainstring[i] <= 90) 

        output[i] = (char)mainstring[i] + 32;

        if( (int)mainstring[i] >= 97 && (int)mainstring[i] <= 122) 

        output[i] = (char)mainstring[i];

        if( (int)mainstring[i] > 122) 

        output[i] = mainstring[i];

    }

    output[i] = '\0'; 

}

//main program

void main()

{

char arr1[21]="PRAsHANT";

char arr2[21]; 

StrToLwr(arr1,arr2); 

cout < < arr2; 

}

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