Bit Integers in C -

i trying problem in c may give 64 bit integers. cannot support in displaying such big number. can do?

#include<stdio.h> #include<string.h> #include<math.h> #include<stdlib.h>  int main() { /* enter code here. read input stdin. print output stdout */ long int a,b,n,c; scanf("%ld %ld %ld",&a,&b,&n); n-=2; while(n--){     c=(b*b)+a;     a=b;     b=c; } printf("%ld",c); return 0; } 

you should use %lld.

scanf("%lld %lld %lld",&a,&b,&n); printf("%lld",c); 

but long int not 64bit integer. use long long int or int64_t inttypes.h.