63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
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/*
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* C Program to Swap the ith and jth Bits for a 32-Bit Integer
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*/
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#include <stdio.h>
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int swap(int,int);
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int number, pos1, pos2;
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int main()
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{
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int result, shift_pos1, shift_pos2;
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printf("\nEnter Number");
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scanf("%d", &number);
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printf("\nEnter bit positions to swap");
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scanf("%d %d", &pos1, &pos2);
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shift_pos1 = number >> pos1;
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shift_pos2 = number >> pos2;
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result = swap(shift_pos1&1, shift_pos2&1);
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printf("%d\n", result);
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}
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int swap(int pos1_val, int pos2_val)
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{
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int temp1, temp2;
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long int base, base1;
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/*
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* If the pos1_val value is 1 then only pos2_val th bit is set to 1 by using << and + operators
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*/
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if (pos1_val == 1)
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{
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base1 = 1 << pos2;
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number = number + base1;
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}
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/*
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*If the pos2_val value is 1 then only pos2_val th bit is set to 1 by using << and + operators
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*/
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if (pos2_val == 1)
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{
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base1 = 1 << pos2;
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number = number + base1;
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}
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/*
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*If the pos1_val value is 0 then only pos2_val th bit is set to 0 using <<, ^ and & operators
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*/
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if (pos1_val == 0)
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{
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base = 0XFFFFFFFF;
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base1 = 1 << pos2;
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temp1 = base ^ base1;
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number = number & temp1;
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}
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/*
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*If the pos2_val value is 0 then only pos1_val th bit is set to 0 using <<, ^ and & operators
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*/
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if (pos2_val == 0)
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{
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base = 0XFFFFFFFF;
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base1 = 1 << pos1;
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temp2 = base ^ base1;
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number = number & temp2;
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}
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return number;
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}
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