qfedu-c-level/test/t1_11.c

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#include <stdio.h>
#define ADD(x, y) (x + y) /*加*/
#define SUB(x, y) (x) - (y) /*减*/
#define MUL(x, y) (x * y) /*乘*/
int main()
{
unsigned int uiA;
uiA = MUL(ADD(9, 2), SUB(6, 3)); // ((9+2)*(6)-(3)) = 63
printf("uiA = %d\n", uiA);
return 0;
}