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POWhat is Sum of Even Terms In Fibonacci (<4million)? [Large Value Datatype Confusion]
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By starting with 1 and 2, the first 10 terms of Fibonacci Series will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... Find the sum of all the even-valued terms in the sequence which do not exceed 4 million. <hr> Now, I got the idea for how to do this. But I'm confused about the data types to hold such big data. I'm getting weird results with <code>int</code>. :( MORE: Its Project Euler 2nd question. But I can't get it. I get crazy values as answer. Can someone please post the ideal program? EDIT: Here's what I wrote for just printing Fibonacci to screen. Bare Basic. My variable goes crazy even when I give 100 for the limit. Is my code wrong? <pre><code>// Simple Program to print Fibonacci series in Console #include <stdio.h> int main() { int x=1,y=2,sum=0,limit=0,i=0,temp=0; printf("Enter Limit:"); scanf("%d",&limit); if(limit==1) printf("%d",x); else if(limit>1) { printf("%d %d",x,y); if (limit>2) { while (i<limit-2) { temp=y; sum=x+y; x=temp; y=sum; printf(" %d",sum); i++; } } } printf("\n"); return 0; } </code></pre> <hr> SOLVED: Actually, I managed to get the solution myself. Here's my program. It works. <pre><code>#include <stdio.h> int main() { int x=1,y=2,sum,limit; //Here value of first 2 terms have been initialized as 1 and 2 int evensum=2; //Since in calculation, we omit 2 which is an even number printf("Enter Limit: "); //Enter limit as 4000000 (4million) to get desired result scanf("%d",&limit); while( (x+y)<limit ) { sum=x+y; x=y; y=sum; if (sum%2==0) evensum+=sum; } printf("%d \n",evensum); return 0; } </code></pre>
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What is Sum of Even Terms In Fibonacci (<4million)? [Large Value Datatype Confusion]
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