Program to illustrate Function prototype


    #include <iostream.h>
    void find_minimum ( int i, int j, int k ) ;        // Function prototype
    void main ( )
    {
        int a, b, c ;
        cout << "\n Input three numbers : " ;
        cin >>a ;
        cin >>b ;
        cin >>c ;
        find_minimum ( a, b, c ) ;                   //   Function call
    }
    void find_minimum ( int i, int j, int k )        // Function definition
    {
        int min ;
              min = i ;
        if ( min > j )
            min = j ;
        if ( min > k )
            min = k ;
        cout<< "\n The minimum number is :" << min ;
    }

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