int sum=0,x=5;do[sum+=x;]while(!--x)最终sum值是多少?

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intsum=0,x=5;do[sum+=x;]while(!--x)最终sum值是多少?intsum=0,x=5;do[sum+=x;]while(!--x)最终sum值是多少?intsum=0,x

int sum=0,x=5;do[sum+=x;]while(!--x)最终sum值是多少?
int sum=0,x=5;do[sum+=x;]while(!--x)最终sum值是多少?

int sum=0,x=5;do[sum+=x;]while(!--x)最终sum值是多少?
=5
sum加了一次x=5,然后进行while 判断,x=4,!x 就 = 0 ,不满足while循环条件,循环结束
sum值也就是5了

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