Question

#include <stdio.h>

int main()
{
float sum_salary=0,sum_raise=0,sum_newsalary=0;
while(1)
{
float salary,rate,raise,newsalary;
printf("Enter Salary :");
scanf("%f",&salary);
if(salary==-1)
{
if(sum_salary==0)
return 0;
else
{
printf("Total Salary :%f Total raise :%f Total New Salary: %f",sum_salary,sum_raise,sum_newsalary);
return 0;
}

}
else
{
if(salary>=0 &&salary<30000)
rate=7;
else if(salary>=30000 &&salary<=40000)
rate=5.5;
else if(salary>40000)
rate=4;
raise=rate*salary/100;
newsalary=salary+raise;
  
sum_salary=salary+sum_salary;
sum_raise=raise+sum_raise;
sum_newsalary=newsalary+sum_newsalary;
printf("Salary :%f rate :%f Raise :%f New Salary: %f\n",salary,rate,raise,newsalary);

}
}
}

Hi can you please make sure that the following program will ask the user the following question before the salaries are entered? I am not sure where I would have to add this in for it ask that. If you can fit this requirement in the program that will be greatly appreciated. Thank you

Here is the question that the program should ask, "How many salaries do you want to enter?"

Answer 1

Source code of the program after changes made and its explanation are given below.Changes are shown in bold case.Screen shot of the code and output are also attached.If find any difficulty, feel free to ask in comment section. Please do upvote the answer.Thank you.

Changes made

• Integer variable n is declared to hold number of salaries.
• Loop control variable i is declared and initialized with 1
• Prompt to enter number of salaries and scanf() statement to read the entered value is place just before while loop
• Since the number of salaries going to enter is pre known,the condition of while loop is changed into i<=n.Loop will executes exactly n times.
• Since the number of salaries going to enter is pre known,no need to enter -1 to stop user input.
• So If statement to check salary is -1 and its else part are eliminated and the statement to display final results are placed after the while loop
• statement to increment i by 1 is included inside loop body

Program as per the requirement

#include <stdio.h>
int main()
{
int n,i=1;
float sum_salary=0,sum_raise=0,sum_newsalary=0;
printf("How many salaries do you want to enter? ");
scanf("%d",&n);
//while loop executes as long as i less than or equal to n
while(i<=n)
{
float salary,rate,raise,newsalary;
printf("Enter Salary %d: ",i);
scanf("%f",&salary);
if(salary>=0 &&salary<30000)
rate=7;
else if(salary>=30000 &&salary<=40000)
rate=5.5;
else if(salary>40000)
rate=4;
raise=rate*salary/100;
newsalary=salary+raise;
  
sum_salary=salary+sum_salary;
sum_raise=raise+sum_raise;
sum_newsalary=newsalary+sum_newsalary;
printf("Salary :%f rate :%f Raise :%f New Salary: %f\n",salary,rate,raise,newsalary);
//updating i
i++;
}
printf("Total Salary :%f Total raise :%f Total New Salary: %f",sum_salary,sum_raise,sum_newsalary);
return 0;
}

Screen shot of the code

Screen shot of the output