C語言譚浩強第三版第九章例題及課後題：預處理命令

  9.1定義一個帶參數的宏，使兩個參數的值互換 #include<stdio.h> #define swap(a,b) tmp = a; a = b; b = tmp; void main(void){ int a; int b; int tmp; printf("Please input two integers:"); scanf("%d%d", &a, &b);

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