The question is pretty basic.
Code:
#include<iostream>
#include<fstream>
using namespace std;
struct Customer
{
char name[20];
char cell[12];
double bal;
};
int get_total_records_from_file(char * filename)
{
// Implement this funtion
return 0;
}
void get_input_from_user(Customer * ptr){
cin.ignore();
for(int i = 0; i < customer_count; i++){
cout<<"Enter Customer Name (1-20 character long)"<<endl;
cin.getline(ptr[i].name,20);
cout<<"Enter Cell No. (11 character long)"<<endl;
cin.getline(ptr[i].cell,20);
cout<<"Enter Initial Balance"<<endl;
cin >> ptr[i].bal;
cin.ignore();
}
}
If I have this error:
main.cpp:22:21: error: ‘customer_count’ was not declared in this scope
what do the various portions of it mean? That is, what's 22? what's 21? etcetra.
Here is the method I have defined that is supposed to accept a String as input and should return the number of times the char 'e' occurs as an int:
public int count_e(String input){
int count = 0;
for (int i = 0;i<input.length();i++){
char e = 'e';
if (input.charAt(i)==e){
count=count+1;
i++;
return count;
}
else{
count=count+1;
i++;
}
}
return count;
}
}
I am trying to write a JUnit test to see if I can input a string into the method and return the correct number of e's. Below is my test, and at the moment I keep getting an error saying that my method count_e is undefined for type String.
Can someone tell me why it is coming up as undefined?
#Test
public void testCount_e() {
String input= "Isabelle";
int expected= 2;
int actual=input.count_e();
assertTrue("There are this many e's in the String.",expected==actual);
}
}
You failed to pass anything to your count_e method!
How about something like:
#Test
public void testCount_e() {
String input = "Isabelle";
int expected = 2;
int actual = count_e(input);
Assert.assertEqual("There are this many e's in the String.", expected, actual);
}
For a unit test, you could probably shorten it to:
#Test
public void testCount_e() {
Assert.assertEqual("There are this many e's in the String.", count_e("Isabelle"), 2);
}
Im trying to solve the Collatz problem. It's all working except of one my int highest which should compare whether counter of one number is greater than counter of next number seems not to be working. I also tried my highest variable as array but still getting no result. Thanks for your any advice.
#include <vector>
#include <iostream>
using namespace std;
int main()
{
__int64 num;
int i;
int counter=0;
//vector<int> a(1000000);
//vector<int> b(1000000);
__int64 highest=0;
int j=0;
for(j=2;j<=1000000;j++)
{
num=j;
counter=0;
for(i=0;i<1000000;i++)
{
cout<<"num is: "<<j<<endl;
if(num==1)
{
break;
}
if(num%2==0)
{
num = num/2;
counter++;
cout<<num<<endl;
}
else if(num%2!=0)
{
counter++;
num= (num*3)+1;
cout<<num<<endl;
}
}
cout<<"counter: "<<counter<<endl;
//this part is not working
if(highest<=counter)
{
highest=counter;
cout<<"highest is: "<<highest<<endl;
}
}
return 0;
}
const char *sentence = "He was not in the cab at the time.";
printf("\"%s\" has %d spaces\n", sentence, (int) ^ {
int i = 0;
int countSpaces = 0;
while (sentence[i] != '\0') {
if (sentence[i] == 0x20) {
countSpaces++;
}
i++;
}
return countSpaces;
});
This code simply counts the white space in a string, but for some reason it says 1606416608 spaces rather than 8. I'm not exactly sure what is going wrong, so thanks for any help!
You're passing the actual block to printf, not the result of the block. Instead, try
const char *sentence = "He was not in the cab at the time.";
printf("\"%s\" has %d spaces\n", sentence, (int) ^ {
int i = 0;
int countSpaces = 0;
while (sentence[i] != '\0') {
if (sentence[i] == 0x20) {
countSpaces++;
}
i++;
}
return countSpaces;
}()); // <-- note the extra parentheses here, indicating that you're calling the block
while doing a program related to variable argument function i
got the header file stdarg.h and have done some simple problem using it
but now when i a changing the actual argument's type it is showing some weird behaviour
here is my code:
#include<stdio.h>
#include<stdarg.h>
void fun(int a,...)
{
va_list k;
va_start(k,a);
int i=0;
printf("%d ",a);
while((i=va_arg(k,int)!=0)
{
printf(" %d ",i);
}
va_end(k);
}
int main()
{
fun(1,2,3,4,5,6);
printf("\n");
fflush(); //and without flush it is also showing some extra garbage value
fun(2,4,5);
printf("\n");
fflush();
fun('c','f','g','l');
return 0;
}
If you use the integer value 0 to indicate end of the argument list, you should also pass a 0 to fun.
fun(1,2,3,4,5,6,0);
fun(2,4,5,0);
First, end your list with 0, because you check for !=0 to detect the end. And also:
while((i=va_arg(k,int))!=0)
instead of
while(i=va_arg(k,int)!=0)
!= has higher precedence than =
This will give you the expected output:
1 2 3 4 5 6
Here's the complete code:
#include<stdio.h>
#include<stdarg.h>
void fun(int a,...)
{
va_list k;
va_start(k,a);
int i=0;
printf("%d ",a);
while((i=va_arg(k,int))!=0)
{
printf(" %d ",i);
}
va_end(k);
}
int main()
{
fun(1,2,3,4,5,6,0);
printf("\n");
//fun(2,4,5,0);
printf("\n");
//fun('c','f','g','l','\0');
getch();
return 0;
}