関連ワード:  write a program to reverse a string without using built-in functions    write a program to reverse a string without using built-in functions in java    write a program to reverse a string without using built-in functions in c    write a program to reverse a string without using built in functions in python    write a program to reverse a given string without using built in functions  
結果 : write a program to reverse a string without using built-in functions