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swap_bitwise.c
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//gcc 5.4.0 #include <stdio.h> /* void swap(int *a, int *b) { int *temp; *temp = *a; *a = *b; *b = *temp; printf("%d %d",*a,*b); } int main(void) { int a = 3, b = 4; swap(&a,&b); return 0; } void swap(int *a, int *b) { *(a+8) = *b; *(b+8) = *a; printf("%d %d",*(a+8),*(b+8)); } int main(void) { int a = 3, b = 4; swap(&a,&b); return 0; } */ // without using 3rd variable and arithmetic operators void swap(int *a, int *b) { *a = *a ^ *b; *b = *a ^ *b; *a = *a ^ *b; printf("%d %d",*a,*b); } int main(void) { int a = 3, b = 4; swap(&a,&b); return 0; }
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Compilation time: 0.13 sec, absolute running time: 0.08 sec, cpu time: 0.01 sec, memory peak: 3 Mb, absolute service time: 0,22 sec
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