C language calculates the sum of factorials from 1 to n

Write the header file

#include<stdio.h>

Write the main function.

#Define sum in the main function using long long, and the defined n is the final factorial number you require.

Then use a for loop to find the sum of factorials of 1 2! .... n!

Test whether Correct, when I enter 5, the result is as follows:

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