int main()
{
int x = 195;
bignum a, b, c;
initialize_bignum(&a);
initialize_bignum(&b);
initialize_bignum(&c);
int_to_bignum(x, &a);
printf("a = "); print_bignum(&a); printf("\n");
reverse_bignum(&a, &b);
printf("b = "); print_bignum(&b); printf("\n");
int_to_bignum(1221, &c);
printf("c = "); print_bignum(&c); printf("\n");
is_palindrome(&c);
return 0;
}
/** Test Function */
int main( )
{
bignum n1, n2, n3, zero;
// Instantiate string buffers for big numbers a and b
char* a = calloc( MAXDIGITS, sizeof( char ) );
char* b = calloc( MAXDIGITS, sizeof( char ) );
// Get big numbers a and b as strings
printf( "a = " );
fgets( a, MAXDIGITS, stdin );
printf( "b = " );
fgets( b, MAXDIGITS, stdin );
// Remove the newline character (if present) from string buffers
char* nl;
if( ( nl = strchr( a, '\n' ) ) != NULL ) *nl = '\0';
if( ( nl = strchr( b, '\n' ) ) != NULL ) *nl = '\0';
// Create a and b big number instances via the string buffers
string_to_bignum( a, &n1 );
string_to_bignum( b, &n2 );
// Test addition
add_bignum( &n1, &n2, &n3 );
printf( "a + b = " );
print_bignum( &n3 );
// Test comparison
int comparison = compare_bignum( &n1, &n2 );
printf( "a %s b\n", comparison == 0 ? "==" : ( comparison < 0 ? ">" : "<" ) );
// Test subtraction
subtract_bignum( &n1, &n2, &n3 );
printf( "a - b = " );
print_bignum( &n3 );
// Test multiplication
multiply_bignum( &n1, &n2, &n3 );
printf( "a * b = " );
print_bignum( &n3 );
// Test division
int_to_bignum( 0, &zero );
if( compare_bignum( &zero, &n2 ) == 0 )
{
printf( "a / b = NaN\n" );
}
else
{
divide_bignum( &n1, &n2, &n3 );
printf( "a / b = " );
print_bignum( &n3 );
}
return 0;
}
int main(int argc, char *argv[]) {
int n;
int sum = 0;
if (argc == 1) n = 5;
else n = atoi(argv[1]);
bignum cur_ans, cur, ans;
int_to_bignum(1, &cur_ans);
for(int i = 1; i <=n; i++) {
int_to_bignum(i, &cur);
multiply_bignum(&cur, &cur_ans, &ans);
cur_ans = ans;
}
print_bignum(&ans);
for(int i = 0; i <= ans.lastdigit; i++) {
sum += ans.digits[i];
}
printf("The ans is %d\n", sum);
return 0;
}
int main(void) {
int a,b;
bignum n1,n2,n3,zero;
while (scanf("%d %d",&a,&b) != EOF) {
printf("a = %d b = %d\n",a,b);
int_to_bignum(a,&n1);
int_to_bignum(b,&n2);
add_bignum(&n1,&n2,&n3);
printf("addition -- ");
print_bignum(&n3);
printf("compare_bignum a ? b = %d\n",compare_bignum(&n1, &n2));
subtract_bignum(&n1,&n2,&n3);
printf("subtraction -- ");
print_bignum(&n3);
multiply_bignum(&n1,&n2,&n3);
printf("multiplication -- ");
print_bignum(&n3);
int_to_bignum(0,&zero);
if(compare_bignum(&zero, &n2) == 0)
printf("division -- NaN \n");
else {
divide_bignum(&n1,&n2,&n3);
printf("division -- ");
print_bignum(&n3);
}
printf("--------------------------\n");
}
return 0;
}
initialize_bignum(bignum *n)
{
int_to_bignum(0,n);
}
