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unsigned int 0~4294967295 (10位数,4e9)
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int -2147483648~2147483647 (10位数,2e9 2^31 - 1)
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long long: -9223372036854775808~9223372036854775807 (19位数, 9e18 ) 2^63 - 1
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unsigned long long:0~18446744073709551615 (20位数,1e19) 2^64 - 1
long long、int的范围
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转载自blog.csdn.net/qq_41280600/article/details/104050285
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