int、long int、long long int的范围

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int、long int、long long int的范围

int -2147483648～2147483647 (10位数，2e9 2^31 - 1)

long int -2147483648～2147483647 (10位数，2e9 2^31 - 1)

long long -9223372036854775808～9223372036854775807 (19位数， 9e18 ) 2^63 - 1