Zaheeda

Village belle Sarita falls in love with young and dashing Ramesh, gets married to him, and re-locates to the city. Once in the city, Ramesh takes her to a brothel, and asks her to wait for him for a few days. Unknown to her, Ramesh has sold her to brothel madame, Champabai, for a hefty fee.

Raja (Dev Anand) has been abandoned by his biological mother at a very young age, and grows up with Master (Jeevan), a criminal don and card-sharp, who would like Raja to continue working with him on a commission basis. Raja learns all that could be learned about playing cards, quits work with Master, and starts work on his own. He succeeds considerably, and soon gets rich and wealthy. He falls in love with beautiful Chandra Gangaram (Zaheeda), and would like to marry her. But her father would like her to marry U.K. settled Ram Mehta(Sudhir), before Raja could do or say anything against this alliance, he is charged with the cold-blooded murder of Master. The climax in Raja's life is in the Court Room where he will find out about his past, and about his parents - while he awaits the outcome of the trial. From http://en.wikipedia.org/wiki/Gambler_(film)

Ramdev Bakshi is the only son of widower and former Indian Army General Durgaprasad, who has been decorated several times with various medals for bravery shown in the line of duty. Alas this did leave him crippled, after he lost a leg during the war with Pakistan. Ramdev is also enlisted in the army, but he is peace-loving and detests war. He has a sweetheart in village belle Suman Mehra, and both hope to get married soon. He does answer the call from the army and joins active duty, only to be arrested and court-martial-ed for disobeying orders. After being dishonorably discharged, he disappears from Suman and his father's lives. Years later, Suman enters a beauty contest and is crowned Miss India. She travels with her mom to Britain, where she meets with Ramdev.

A young woman agrees to marry a much older man in order to save her grandfathers home.