Takes the specified length of data from the specified bit bit of a given positive integer

• Interface description

Prototype:

unsigned int getbitsvalue (unsigned int input, unsigned int startbit, unsigned int bitlen)

Input parameters:

Integer entered by input

Startbit need to get the start bit

Bitlen the bit length to get

Output parameters (the memory area pointed to by the pointer is guaranteed to be valid):

No

return value:

The corresponding bit value

Example:

Input: 4, 2, 2

Returns: 2

4 The corresponding binary is 1 (bit0 and bit1 are 0,bit2), then 2 bits starting from Bit2 are 10, then the corresponding decimal is 2.

#include <stdlib.h> #include <string.h> #include "oj.h"/* Function:    input: Pintarray: Array, ncout: array length    output:     return: Returns the maximum value     */int getsubarraysum (int* pintarray, int ncount) {/    * here implements the function */      int thissum,maxsum,j;  Thissum = Maxsum =0;  for (j = 0;j < ncount;j++)  {    thissum + = pintarray[j];        if (Thissum > Maxsum)      maxsum = thissum;    else if (Thissum < 0)      thissum = 0;   }  return maxsum; }</span>

Algorithm ideas:

Using integers to convert to 2, the number is first stored in an array, and then the specified number of digits is read out.

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Takes the specified length of data from the specified bit bit of a given positive integer