Using C language to calculate the factorial of N and its summation (multiple methods)

To calculate the factorial of a number:

#include <stdio.h>

int main ()

{

int n,i;

scanf ("%d", &n);

for (i=n-1;i>0;i--)

{

N=n*i;

}

printf ("%d", n);

return 0;

}

Calculate 1! +2! +3! +...+10!

#include <stdio.h>

int main ()

{

int a,b,c;

int sum=0;

for (a=1;a<=10;a++)//control of 1-10 digits

{

for (b=1,c=1;b<=a;b++)//control the factorial of each number

{

C=b*c;

}

sum+=c;//the result in sum

}

printf ("%d", sum);

return 0;

}

Using a loop to find 1-10 factorial and

#include <stdio.h>

#include <stdlib.h>

int main ()

{

int num = 1;

int i = 0;

int sum = 0;

for (i = 1; i <=; i++)

{

int TMP = i;//defines a temporary variable to hold I (because the variables inside the for loop cannot be arbitrarily modified)

num = num *tmp;

sum + = num;

}

printf ("%d\n", sum);

return 0;

This article is from the "Sunflower in the Sun" blog, please be sure to keep this source http://10796797.blog.51cto.com/10786797/1706958

Computes the factorial of N and its summation (multiple methods) using the C language