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| #include<stdio.h>
/*
*Name : calculator.c
* Vertion : 0.1
* Author : Beat
* 14-sep-2007
* Description : This application is a basic calculator.
* It has another interesting feature : print multiplication table accordin to user input.
* Operators used to perform operations are :
* + addition
* - subtraction
* * multiplication
* / division
*
* Type -help to see how program works.
*
*
*/
int calculate(void);
int help(void);
int table(void);
int main()
{
printf("\t\t\t ------------------- \n");
printf("\t\t\t | Basic Calculator | \n");
printf("\t\t\t ------------------- \n");
printf("\t\t\t | Coded by Beat | \n");
printf("\t\t\t --------------- \n");
printf("\t\t\t Usage : \n");
printf("\t\t\t ------- \n\n");
printf("\th --help -> shows how program works\n\tt --table -> prints multiplication table of a number\n\tc --calculate -> switch to basic calculating\n\tq --quit -> To exit program\n\n\n");
char choice;
printf("Menu >");
while(choice != 'q')
{
scanf("%c", &choice);
if(choice == 'h')
{ help();}
else if(choice == 't')
{ table();}
else if(choice == 'c')
{ calculate();}
else
{ printf("Menu >");}
}
printf("\n\n\n\t\t\tBye ------------------>See you soon !\n\n\n");
return 0;
}
int calculate(void)
{
double i = 0, j = 0;
char operator;
printf("Calculator >");
scanf("%lf %c %lf", &i, &operator, &j);
switch(operator)
{
case '+': printf("Result is -> %lf\n", i+j);
break;
case '-': printf("Result is -> %lf\n", i-j);
break;
case '*': printf("Result is -> %lf\n", i*j);
break;
case '/': printf("Result is -> %lf\n", i/j);
break;
default : printf("Bad syntax ! type h for more information");
}
return 0;
}
int table(void)
{
int i = 0, j = 1, k;
printf("Multiplication Table >");
scanf("%d", &i);
while(j<11)
{
k = j*i;
printf("%d x %d = %d\n", j, i, k);
j++;
}
return 0;
}
int help()
{ printf("\t\t\t\t\t\t| help |\n");
printf("\t\t\t\tBasic calculator is, as it's name tells,\n\t\t\t\ta program alowing to do some basic calculations\n\n\n");
printf("\t-c : This command switchs to calculate mode. type 1st number <space> operator <space> 2nd number.\n Existing operators : + * / - for addition, multiplication, division and substraction.\n\n");
printf("\t-t : Shows multiplication table of an number. Just type the number and press Enter.\n\n");
return 0;
} |
