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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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* C Program to Replace Bits in Integer from Specified Positions from
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* Another Integer
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*/
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#include <stdio.h>
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void replace_bits(int, int, int, int);
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int main()
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{
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int number_x, number_y, start_pos, end_pos;
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printf("\nEnter the number x in hexa decimal ");
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scanf("%x", &number_x);
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printf("\nEnter the number y in hexa decimal");
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scanf(" %x", &number_y);
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printf("\nEnter value for a");
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scanf("%d", &start_pos);
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printf("\nEnter value for b");
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scanf("%d", &end_pos);
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replace_bits(number_x, number_y, start_pos, end_pos);
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}
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/*
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* Replace bits in first number from specified position with bits in second number
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*/
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void replace_bits(int number_x, int number_y, int start_pos, int end_pos)
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{
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int i, shift_y, ybit;
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long int temp, t;
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/*
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* Replace the corresponding x bits by y bits
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*/
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for (i = start_pos; i <= end_pos; i++)
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{
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shift_y = number_y >> i;
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ybit = shift_y & 1;
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if (ybit == 1)
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{
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temp = 1 << i;
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number_x = number_x | temp;
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}
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if (ybit == 0)
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{
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t = 0XFFFFFFFF;
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temp = 1 << i;
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start_pos = t ^ temp;
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number_x = number_x & start_pos;
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}
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}
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printf("%x", number_x);
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} |