#include 
		#include 
		int main()
		{
			printf("******************************\n");
			printf("******SALARY CALCULATOR*******\n");
			printf("******************************\n");
			double rate,hrs,hrly_rate,tax_rate,tax,gross_salary,net_salary;
			printf("Enter the hours worked in the month > ");
			scanf("%lf",&hrs);
			printf("Enter the hourly rate > ");
			scanf("%lf",&hrly_rate);
			printf("Enter the tax rate > ");
			scanf("%lf",&tax_rate);
			gross_salary = hrs*hrly_rate;
			tax = tax_rate*gross_salary/100;
			net_salary = gross_salary - tax;
			printf("Gross Salary: GHC %f\n",gross_salary);
			printf("Tax: GHC %f\n",tax);
			printf("Next Salary: GHC %f\n",net_salary);
			return 0;
		}
	

   
		#include 
		#include 
		int main()
		{
			printf("******************************\n");
			printf("******GRADE CALCULATOR*******\n");
			printf("******************************\n");
			char exit = 'c';
			double score;
			while(exit !='e'){
				printf("Enter the examination score > ");
				scanf("%lf",&score);
				if(score>=80){
					printf("Grade: A\n");
				}else if(score>=75){
					printf("Grade: B+\n");
				}else if(score>=70){
					printf("Grade: B\n");
				}else if(score>=65){
					printf("Grade: C+\n");
				}else if(score>=60){
					printf("Grade: C\n");
				}else if(score>=55){
					printf("Grade: D+\n");
				}else if(score>=50){
					printf("Grade: D\n");
				}else{
					printf("Grade: E\n");
				}
				printf("Enter e to exit or any other character to continue > ");
				scanf("%s",&exit);
			}
			return 0;
		}
	

   
		#include 
		#include 
		int main()
		{
			printf("******************************\n");
			printf("*******ENERGY CALCULATOR*******\n");
			printf("******************************\n");
			char exit = 'c';
			while(exit !='e'){
				int option;
				printf("Enter 1 for potential energy or 2 for kinetic energy > ");
				scanf("%d",&option);
				if(option==1){
					double mass,acc,height,pe;
					printf("Enter the mass of the body > ");
					scanf("%lf",&mass);
					printf("Enter the height > ");
					scanf("%lf",&height);
					printf("Enter the acceleration due to gravity > ");
					scanf("%lf",&acc);
					pe = mass*acc*height;
					printf("The potential energy of a body of mass %f kg at height of %f m at an acceleration due to gravity of %f m/s square is %fJ\n",mass,height,acc,pe);
				}else if(option==2){
					double mass,velocity,ke;
					printf("Enter the mass of the body > ");
					scanf("%lf",&mass);
					printf("Enter the velocity of the body > ");
					scanf("%lf",&velocity);
					ke = mass*velocity*velocity/2;
					printf("The kinetic energy of a body of mass %f kg at a velocity of %f m/s is %fJ\n",mass,velocity,ke);
				}
				printf("Enter e to exit or any other character to continue > ");
				scanf("%s",&exit);
			}
			return 0;
		}