kdeng00
43 lines
722 B
C
43 lines
722 B
C
/*
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*
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* Exercise 4-14. Define a macro swap(t,x,y) that interchanges two arguments of type t.
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*
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* Author: Kun Deng
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*/
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#include <stdio.h>
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// Macro definition
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#define swap(t, x, y) do \
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{ \
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t tmp = x; \
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x = y; \
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y = tmp; \
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} while(0)
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void print_pair(const int x, const int y, const char *message)
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{
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printf("%s: x = %d and y = %d\n", message, x, y);
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}
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int main()
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{
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int x_int = 10, y_int = 25;
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print_pair(x_int, y_int, "Before");
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swap(int, x_int, y_int);
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print_pair(x_int, y_int, "After");
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float x_double = 99.99, y_double = 8.55;
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print_pair(x_double, y_double, "Before");
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swap(float, x_double, y_double);
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print_pair(x_double, y_double, "After");
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return 0;
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}
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