Created
January 8, 2012 00:10
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//The sum of the squares of the first ten natural numbers is, | |
//12 + 22 + ... + 102 = 385 | |
//The square of the sum of the first ten natural numbers is, | |
//(1 + 2 + ... + 10)2 = 552 = 3025 | |
/*Hence the difference between the sum of the squares of the first ten | |
natural numbers and the square of the sum is 3025 − 385 = 2640.*/ | |
/*Find the difference between the sum of the squares of the first one | |
hundred natural numbers and the square of the sum.*/ | |
int sumofall(int a); | |
#include <stdio.h> | |
int main(int argc, char **argv) | |
{ | |
int g, r, answer, f; | |
f = 0; | |
g = sumofall(100) * sumofall(100); | |
for(r = 1;r <= 100; r++) | |
{ | |
f += r*r; | |
} | |
answer = g - f; | |
printf("%d", answer); | |
return 0; | |
} | |
int sumofall(int a) | |
{ | |
int b; | |
b = (a / 2) * (a + 1); | |
return b; | |
} |
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