一、sum += 1;与sum = sum + 1;是相等的,运算结果相等;
二、用一段代码说明;
# define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>int main()
{//初始变量值;int n1 = 1;int n2 = 1;//输出;printf("运算前的n1=%d,n2=%d", n1, n2);//换行;printf("\n");//运算;n1 += 1;n2 = n2 + 1;//输出;printf("n1+=1的结果为:%d,n2=n2+1的结果为:%d", n1, n2);//换行;printf("\n");return 0;
}