不要香菜6754782
2021-10-27 14:33
sum=sum+i; i++;
实在搞不懂这个代码到底是怎么算的?
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上面已经定义sum=0;i=1;
sum=sum+i;就是将sum+i的值赋给sum;
第一次执行就是sum=sum(0)+i(0);这个时候sum值就变成1了;
且有个i++;则i变成2;
则第二次执行就是sum=sum(1)+i(2);这个时候sum值就变成3了,也就是1+2;经过i++;则i变成3;
则第三次执行就是sum=sum(3;也就是1+2)+i(3);这个时候sum值就变成6了,也就是1+2+3;
以此类推
sum = 0 +1 = 1
i = 1+1 = 2
i = 2 <=100
sum = 1 + 2 = 3
i = 2 +1 = 3
i = 3 <= 100
sum = 3 + 3 = 6
i = 3 + 1 = 4
i = 4 <= 100
.
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.
.
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将++i写前面吧
0=0+1?这也不对呀
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