语法-运算

新建项operate.c
1.数字
将variable.c最后一个main方法的名改为main04

#include <stdio.h>

int main(void) {
	int num = 1;
	num = 2;
	num += 3;
	num *= 4;
	num -= 5;
	num /= 6;
	printf("%d", num);
	return 0;
}

2.字符
将上一个main方法的名改为main11

#include <string.h>

int main(void) {
	char ch1 = 'H';
	char ch2 = 'e';
	char ch3 = 'l';
	char ch4 = 'o';
	char str[] = {ch1, ch2, ch3, ch3, ch4, '\0'};
	char str_[13];
	strcpy_s(str_, sizeof(str_), str);
	strcat_s(str_, sizeof(str_), " world!");
	printf("%s", str_);
	return 0;
}