Problem with '=' Operand.. Please help!

[blacklesness]

The following code has 16 errors of the same type: error C2106: '=' : left operand must be l-value

The errors are found within points //A and //B.

Could someone show me how to overcome these errors?

/*	LEARN ARITHMETICS is a program designed to train one in arithmetic operations by assigning questions
	to the user and giving output depending on whether the answer is right or wrong. */
#include<stdio.h>
#include<stdlib.h>
void randomNumbers();
int main()
{
	int one;
	int two;
	int three;
	int four;
	int five;
	int anOperator, pAnswer, uAnswer, grade;
	char signOperator;
	printf("LEARN ARITHMETICS\nTo begin;\n\tEnter 1 for Addition\n\tEnter 2 for Subtraction\n\tEnter 3 for Multiplication\n\tEnter 4 for Division\n\tEnter 5 for All\n");
	scanf("%d", &anOperator);
	printf("Enter your grades;\n\t1 for Grade one\n\t2 for Grade two\n\t3 for Grade three");
	scanf("%d", &grade);
	if (grade == 1) //A
		one = (rand() % 10) & two = (rand() % 10) & three = (rand() % 10) & four = (rand() % 10) & five = (rand() % 10);
	else if (grade == 2)
		one = (rand() % 100) & two = (rand() % 100) & three = (rand() % 100) & four = (rand() % 100) & five = (rand() % 100);
	else one = (rand() % 1000) & two = (rand() % 1000) & three = (rand() % 1000) & four = (rand() % 1000) & five = (rand() % 1000);
	do
	{
		if (anOperator == 1)
			pAnswer = one + two & signOperator = '+';
		if (anOperator == 2)
			pAnswer = one - two & signOperator = '-';
		if (anOperator == 3)
			pAnswer = one * two & signOperator = '*';
		if (anOperator == 4)
			pAnswer = one / two && signOperator = '/'; //B
		pAnswer = ((((one / two) * three) + four) - five) && (printf("%d / %d * %d + %d - %d = ?", one, two, three, four, five));
		printf("%d %c %d = ? (Enter the correct value)\n", one, signOperator, two);
		scanf("%d", &uAnswer);
		if (uAnswer = pAnswer)
			printf("Keep up the good work\n");
		printf("No. Please try again\n");
	}
	while (uAnswer = pAnswer || uAnswer != pAnswer);
	return 0;
}

The above program is unfinished.

[Elysia]

What are these supposed to do?
one = (rand() % 10) & two = (rand() % 10) & three = (rand() % 10) & four = (rand() % 10) & five = (rand() % 10);
one = (rand() % 100) & two = (rand() % 100) & three = (rand() % 100) & four = (rand() % 100) & five = (rand() % 100);
one = (rand() % 1000) & two = (rand() % 1000) & three = (rand() % 1000) & four = (rand() % 1000) & five = (rand() % 1000);
pAnswer = ((((one / two) * three) + four) - five) && (printf("%d / %d * %d + %d - %d = ?", one, two, three, four, five));

[BEN10]

The error is not in the if statement but the immediate staement following it.

[blacklesness]

@Elysia Well, the program is meant test one's mathematical aptitude by letting them choose operators then grade levels i.e. Choose '+' then 2. This means the user will have to solve a sum with the addition operator and the operands will have two digits. If he chooses '/' then 3, three digit figures will appear for division calculations.
(rand() %10) generates a randon number within 1 - 9 ie one digit figure
(rand() %100) generates a randon number within 1 - 99 ie two digit figure
(rand() %1000) generates a randon number within 1 - 999 ie three digit figure

pAnswer is the answer generated by the program that will be compared to that input by the user 'uAnswer'.



@BEN10 could you be more specific please?

[Elysia]

The problem is that what you have written is wrong (it won't compile), so I am unsure of what you actually meant to write on those lines.
For example, what is this supposed to do?
((((one / two) * three) + four) - five) && (printf("%d / %d * %d + %d - %d = ?", one, two, three, four, five));

What did you intend the program to do with the line?

[King Mir]

I'm not sure what you think & does, but it's not what you think. & is bitwise AND when given two operands.

Perhaps you are trying to condense multiple assignments into a single line. If so the correct operator is ',', but you do not what to use it here. Just use a block and have each assignment on a separate semicolon terminated line.

[blacklesness]

I have seen what is wrong with this code hence i'll close this thread. Thanks for your help everyone... :-)