Question

How to use _strtoui64 to convert a string to an unsigned __int64 in C

Answer 1

#include <stdio.h>
#include <stdlib.h>

int main() {
	char s[] = "18038372765213089826";

	unsigned __int64 ui64 = _strtoui64(s, NULL, 10);
	printf("%I64u\n", ui64);

	char ch = getchar();

	return 0;
}



/*
run:

18038372765213089826

*/

 

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