Question

please help

7.(10) a. What are the four parts of a loop? (10) b. Given the following, what will print out? sum = 1; snt = 0; do sum - sum + cnt: snt=sum + 2; } while ( nt < 10) sout << "sum="<< sum << "snt="<<ent <endl; (5) b. Is the above a good way to write a loop? Explain. (Think of parts of a loop.)

Answer 1

10 a.

Four part of loop 1. Initialization: in which we initialize the variable value 2.Continuation test: in which we test the condition is true or false. 3.Update step: in which we increment or decrement the variable. 4.Loop body: in which we write the code which we want. initialization Continuation Update step For(i=0; i<10; i++) loop body /*code* /

Four part of loop

1. Initialization: in which we initialize the variable value

2. Continuation test: in which we test the condition is true or false.

3. Update step: in which we increment or decrement the variable.

4. Loop body: in which we write the code which we want.

10 b.

input code:

1 #include <iostream> 2 using namespace std; 999 4 int main() 5-{ /*declare the variables*/ int sum=1,cnt=0; /*use Loop for do sum*/ do{ sum=sum+cnt; cnt=sum+2; }while(cnt<10); /*print sum and cnt*/ cout<<"Sum="<<sum<<"cnt="<<cnt<<endl; return 0; 16 } 17

output:

Sum=10cnt=12 ... Program finished with exit code Press ENTER to exit console.

code:

#include <iostream>
using namespace std;

int main()
{
/*declare the variables*/
int sum=1,cnt=0;
/*use loop for do sum*/
do{
sum=sum+cnt;
cnt=sum+2;
}while(cnt<10);
/*print sum and cnt*/
cout<<"Sum="<<sum<<"cnt="<<cnt<<endl;
return 0;
}

1 #include <iostream> 2 using namespace std; 5- int main() { /*declare the variables*/ int sum=1,cnt=0; /*use loop for do sum*/ 9- do{ sum=sum+cnt; cnt=sum+2; }while(cnt<10) /*print sum ana cnt*/ cout<<"Sum="<<sum<<"cnt="<<cnt<<endl; return 0; i put; here if it is not there than it will give below error. 16 } input Compilation failed due to following error(s). main.cpp: In function 'int main()': main.cpp:14:5: error: expected ';' before 'cout cout<<"Sum="<<sum<<<"cnt="<<cnt<<endl;

10.c)

Is the above a good way to write a loop? Explain. • No it not a good way to write the loop. • You should write the loop as the below. do { sum=sum+cnt; cnt=sum+2; while (cnt<10); • You should write loop according to this step. • So program can find the condition and body part of loop quickly. Here we write only few line of code so we can write it in any way. • But if we make a projects than there will be very long code. • So it is hard to find the specific if we write in any way.

Is the above a good way to write a loop? Explain.

· No it not a good way to write the loop.

· You should write the loop as the below.

do {
    sum=sum+cnt;

     cnt=sum+2;
}
while (cnt<10);

· You should write loop according to this step.

· So program can find the condition and body part of loop quickly.

· Here we write only few line of code so we can write it in any way.

· But if we make a projects than there will be very long code.

· So it is hard to find the specific if we write in any way.