Answer to Question #198908 in C for Nabeel khan

Question

Write a function that accepts three arguments a number n, and two characters s and t. The function convert n from s unit to t unit of similar physical quantities. You can choose one of the following types to use in your program:

1. Length

2. Temperature

3. Area

4. Volume

5. Weight

6. Time

Answer 1

#include <stdio.h>
#include <stdlib.h> 

float convertTemperature(float n,char s,char t);

int main() {
	float temperature;
	int ch=-1;
	while(ch!=7){
		printf("1. Celsius to Fahrenheit\n");
		printf("2. Kelvin to Fahrenheit\n");
		printf("3. Fahrenheit to Celsius\n");
		printf("4. Celsius to Kelvin\n");
		printf("5. Kelvin to Celsius\n");
		printf("6. Fahrenheit to Kelvin\n");
		printf("7. Exit\n");
		printf("Your choice: ");
		scanf("%d",&ch);
		if(ch>=1 && ch<=6){
			printf("Enter the temperature: ");
			scanf("%f",&temperature);
		}
		if(ch==1){
			temperature=convertTemperature(temperature,'C','F');
			printf("%.2f F\n\n",temperature);
		}else if(ch==2){
			temperature=convertTemperature(temperature,'K','F');
			printf("%.2f F\n\n",temperature);
		}else if(ch==3){
			temperature=convertTemperature(temperature,'F','C');
			printf("%.2f C\n\n",temperature);
		}else if(ch==4){
			temperature=convertTemperature(temperature,'C','K');
			printf("%.2f K\n\n",temperature);
		}else if(ch==5){
			temperature=convertTemperature(temperature,'K','C');
			printf("%.2f C\n\n",temperature);
		}else if(ch==6){
			temperature=convertTemperature(temperature,'F','K');
			printf("%.2f K\n\n",temperature);
		}else if(ch==7){
			//exit
		}else{
		
		}
	}
	getchar();
	getchar();
	return 0;
}


//a function that accepts three arguments a number n, and two characters s and t. 
//The function convert n from s unit to t unit of similar physical quantities.
float convertTemperature(float n,char s,char t){
	//Celsius to Fahrenheit	° F = 9/5 ( ° C) + 32
	if(s=='C' && t=='F'){
		return ((9.0/5.0) * n) + 32;
	}
	//Kelvin to Fahrenheit	° F = 9/5 (K - 273) + 32
	if(s=='K' && t=='F'){
		return (9.0/5.0*(n - 273.15)) + 32;
	}
	//Fahrenheit to Celsius	° C = 5/9 (° F - 32)
	if(s=='F' && t=='C'){
		return (9.0/5.0)*(n- 32);
	}
	//Celsius to Kelvin	K = ° C + 273.15
	if(s=='C' && t=='K'){
		return n + 273.15;
	}
	//Kelvin to Celsius	° C = K - 273.15
	if(s=='K' && t=='C'){
		return n - 273.15;
	}
	//Fahrenheit to Kelvin	K = 5/9 (° F - 32) + 273
	if(s=='F' && t=='K'){
		return ((5.0/9.0) *(n - 32)) + 273.15;
	}
	return -1;
}