如何在C语言中用1,2,3,4表示加减乘除？

Question

如题所述

Answer 1

可以通过改变operation的值（1到4）来选择运算符号，如修改int operation = 2;为减法运算
#include <stdio.h>
#define ADD 1
#define SUBTRACT 2
#define MULTIPLY 3
#define DIVIDE 4
int main(void) {
int a = 10, b = 5;
int operation = 1;
int result;
if (operation == ADD) {
result = a + b;
} else if (operation == SUBTRACT) {
result = a - b;
} else if (operation == MULTIPLY) {
result = a * b;
} else if (operation == DIVIDE) {
result = a / b;
}
printf("Result: %d\n", result);
return 0;
}