artificial intelligence - Learning Algorithm not working? -

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learning algorithm of single layer precptons works given training data, not new input.is there way correct this?

    private void traning(){         while(true){             int errorcount = 0;             for( int = 0 ; < input_set_count ; i++ ){                 float weightsum = 0;                 for( int j = 0 ; j < no_input ; j++ ){                                       weightsum = weightsum + weight[j] * train_data[i][j];                 }                 int toutput = 0;                 if( weightsum >= threshold )                     toutput = 1;                                 int error = output[i] - toutput;                 if( error != 0 )                     errorcount++;                  for( int j = 0 ; j < no_input ; j++ ){                     weight[j] = weight[j] + error * train_data[i][j] * learning_rate;                 }             }             if( errorcount == 0 )                 break;         }         system.out.println("traning completed...");        }


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