Okay, we have very good news. The calculator has came to life! YAY!
Code:
/* C-Calculator by Matthew Nicola */
/* Mid-Term project of M. Fagan's C Programming Class */
#include <stdio.h>
#include <conio.h>
/*This is where the coding takes place:*/
#pragma argsused
int
main(void)
{
double mainval, /* The starting value for the program */
memory, /* Holds memory value for memory functions */
newval, /* This modifies the main value by operation */
exit1; /* Prevents breaking of loop */
char opr; /* Term for basic functions */
exit1 = 0;
mainval = 0;
memory = 0;
/* Calculator Introduction */
printf("Welcome to Matt Nicola's C Calculator!\n");
printf("Enter an operator and then enter the value\n");
printf("to correspond with the operator. Enjoy!\n\n");
printf("Enter H in operator for basic commands.\n\n");
while (exit1 == 0) {
printf("\nMEMORY: %lf", memory);
printf("\nThe current value is %lf", mainval);
printf("\n\nEnter the operator to begin: ");
scanf("%c", &opr);
switch (opr) {
case '+': /* Addition */
printf("\nEnter a value to add to the main value. ");
scanf("%lf", &newval);
mainval = mainval + newval;
break;
case '-': /* Subtraction */
printf("\nEnter a value to subtract from the main value. ");
scanf("%lf", &newval);
mainval = mainval - newval;
break;
case '*': /* Multiplication */
printf("\nEnter a value to multiply the main value. ");
scanf("%lf", &newval);
mainval = mainval * newval;
break;
case '/': /* Division */
printf("\nEnter a value to divide the main value. ");
scanf("%lf", &newval);
mainval = mainval / newval;
break;
case 'C': /* Clear */
case 'c':
mainval = 0.0;
printf("\nThe main value has been cleared.\n");
break;
case 'A': /* Add to memory */
case 'a':
printf("\nEnter a value to add to the memory. ");
scanf("%lf", &newval);
memory = memory + newval;
break;
case 'D': /* Subtract from memory */
case 'd':
printf("\nEnter a value to deduct from memory. ");
scanf("%lf", &newval);
memory = memory - newval;
break;
case 'R': /* Return the memory */
case 'r':
mainval = memory;
printf("\nMemory has returned to the main value.\n");
break;
case 'H': /* Gives basic commands to user */
case 'h':
printf("\nHELP CONTENTS\n\n");
printf("Basic operations comply to their sign.\n");
printf("c = Clear the main value.\n");
printf("a = Add value to memory.\n");
printf("d = Subtract a value from memory.\n");
printf("r = Place the memory value into the main value.\n");
printf("x = Clear the value of the memory.\n");
printf("e = Exit the program.\n\n");
break;
case 'X': /* Clear the memory */
case 'x':
memory = 0.0;
printf("\nThe memory has been cleared.\n");
break;
case 'E': /* Exit program */
case 'e':
printf("\nThank you for using the calculator. Enter any key");
printf("\nand press ENTER to exit the program.");
scanf(" ");
exit1 = 1;
break;
default:
printf("\nThat case does not comply to the operator.\n");
break;
} /* End of Switch statement. */
} /* End of While statement. */
return (0);
}
There's just two things to take care of with this.
- Reduce the value to its hundredths place (o.oo)
- Take care of the bug that's making my program repeat something once everytime I enter a value.
At least it still works, but I just have one bug to take care of.
