//A program for using malti purpose that general calculating,interesr calculating, age calculating;
/*The program has three part 1.General Calcultion
2.Age Calculation
3.Interest Calculation*/
/*Program Authority:
Ripon Chandra das
Dept of Computer Science and Engineering
University of Barisal.
Spervised by:
Rahat Hossain Foysal
Lecturer
Dept of Computer Science and Engineering
University of Barisal.*/
#include<stdio.h>
#include<conio.h>
#include<math.h>
//gencal is a subfunction used for general calculator
//agecal is a subfunction used for age calculation
//incal is a subfunction used for interest calculating
void gencal(void);
void agecal(void);
void incal(void);
int main()
{
char n;//n for while statement
system("color 2f");
system("cls"); //24 symbol of green background and red letter
//character type declaretion for switch atatement
char ch;
printf(".................WELCOME TO THE RIPON CHANDRA DAS'S HALLO WORLD.................\n");
printf(" ******************\n");
printf(" * *\n");
printf(" **************** MULTI-CAL ****************\n");
printf(" * *\n");
printf(" ******************\n");
//do...while statement use for continuing the program rpeatly
do
//switch statement use for the purpose of multi funct
{
system("color 2f");
printf("\n\nPlease enter your choice\n");
printf("\nEnter 1 for General Calculator\n");
printf("Enter 2 for Age Calculator\n");
printf("Enter 3 for Interest Calculator");
ch=getche();
switch(ch)
{
case '1':
gencal(); //gencal () is used for general calculator
break;
case '2':
agecal(); //agecal is used for age calculation
break;
case '3':
incal(); //incal is used for interest calculator
break;
default:
printf("\nYou enter a wrong number.\n Please try again.\n");
break;
}
printf("\nPlease enter a value except 0 to run the program again.");
n=getche();
}
while(n!=0);
getch();
}
void add(void);
void sub(void);
void mul(void);
void div(void);
void sq(void);
void gencal(void)
{
system("color 3f");
system("cls");//30 for aqua light white
char i;
char p; //i for while statement and p for switch statement
printf("\n This is General Calculator\n");
do
{
printf("\nPlease enter 1 for Addition\n");
printf("Please enter 2 for Subtraction\n");
printf("Please enter 3 for Multiplication\n");
printf("Please enter 4 for Divition\n");
printf("Please enter 5 for Square Root");
printf("\nEnter 6 for main menu");
p=getche();
//switch statement use for the purpose of multi function calling
switch(p)
{
case '1':
add();//called a function for addition
break;
case '2':
sub();//called a function for subtraction
break;
case '3':
mul();//called a function for multiplication
break;
case '4':
div();//called a function for divition
break;
case '5'://called a square root sub function
sq();
break;
case '6':
main();
break;
default:
printf("\nYou enter a wrong number.");
break;
}
printf("\n Enter 0 to run General Calculator again.");
i=getche();
}
while(i=0);
}
void add(void)
{
system("color 81");//81 for gray blue
system("cls");
double a,b,sum;
printf("Welcome to the addition calculating:\n");
printf("Please enter a number:");
scanf("%lf",&a);
printf("Enter another number:");
scanf("%lf",&b);
sum=a+b;
printf("The summation is:%lf\n\n",sum);
}
void sub(void)
{
system("color 5b"); //5b stands for purple light aqua
system("cls");
double a,b,sum;
printf(" Welcome to the subtraction calculating:\n");
printf("Please enter a number:");
scanf("%lf",&a);
printf("Enter another number:");
scanf("%lf",&b);
sum=a-b;
printf("The subtraction is:%lf\n\n",sum);
}
void mul(void)
{
system("color 71");//71 for white blue
system("cls");
double a,b,sum;
printf(" Welcome to the multiplication calculating:\n");
printf("Please enter a number:");
scanf("%lf",&a);
printf("Enter another number:");
scanf("%lf",&b);
sum=a*b;
printf("The multiplication is:%lf\n\n",sum);
}
void div(void)
{
system("color 34");//34 for aqua red
system("cls");
double a,b,sum;
printf(" Welcome to the divition calculating:\n");
printf("Please enter a number:");
scanf("%lf",&a);
printf("Enter another number:");
scanf("%lf",&b);
sum=a/b;
printf("The divition is:%lf\n\n",sum);
}
void sq(void)
{
system("color 3a");//3a for aqua light green
system("cls");
int i;
float j;
printf("\n\nSquare Root Calculation:");
printf("\nEnter a number:");
scanf("%d",&i);
j=sqrt(i);
printf("\nSquare Root is:%f",j);
}
void agecal(void)
{
system("color c7");//c7 for light red white
system("cls");
printf("\nAge Identifier:\n");
int day,month,year,day1,month1,year1,day2,month2,year2;
printf("\nPlease enter value of birth day:");
scanf("%d",&day);
printf("Please enter value of birth month:\n");
scanf("%d",&month);
printf("Please enter value of birth year:\n");
scanf("%d",&year);
printf("Please enter value of present date(day):\n");
scanf("%d",&day1);
printf("Please enter value of present month:\n");
scanf("%d",&month1);
printf("Please enter value of present year:\n");
scanf("%d",&year1);
if(day<day1){
day2=day1-day;
}
else{
day2=(day1+30)-day;
month=month+1;
}
if(month<month1){
month2=month1-month;
}
else{
month2=(month1+12)-month;
year=year+1;
}
year2=year1-year;
printf("Age is:%d year %d month %d day\n\n",year2,month2,day2);
}
void incal(void)
{
system("color e1");//e1 for light yellow blue
system("cls");
int amount,year,month,i;
double interest,m,y,t_am;
printf("\n This is Interest Calculator\n");
printf("If interest is inturms of month press 1.\nIf interest is inturms of year press 2.");
scanf("%d",&i);
//here uses if else cnditional statement for display two another purpos
if(i==1){
printf("Enter the amount:");
scanf("%d",&amount);
printf("Enter the value of percentage of monthly interest:");
scanf("%lf",&interest);
printf("Enter the month:");
scanf("%d",&month);
printf("Enter the year:");
scanf("%d",&year);
m=(amount*interest*month)/100;
printf("Monthly total interest=%lf\n",m);
y=(12*year*interest*amount)/100;
printf("Yearly total interest=%lf\n",y);
t_am=amount+m+y;
printf("Total amount=%lf\n\n",t_am);
}
else if(i==2){
printf("Enter the amount:");
scanf("%d",&amount);
printf("Enter the value of percentage of yearly interest:");
scanf("%lf",&interest);
printf("Enter the month:");
scanf("%d",&month);
printf("Enter the year:");
scanf("%d",&year);
m=(amount*(interest/12)*month)/100;
printf("Monthly total interest=%lf\n",m);
y=(amount*year*interest)/100;
printf("Yearly total interest=%lf\n",y);
t_am=amount+m+y;
printf("Total amount=%lf\n\n",t_am);
}
}
