Question

: Please write a MARIE program to calculate 1+2+3+...+100.

Answer 1

`Hey,

Note: Brother if you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

LDA 301BH

MOV B, A

INR A

MOV C, A

MVI A, 00H

LOOP1 ADD B

DCR C

JNZ LOOP1

MVI C, 02H

MVI B, 00H

LOOP2 INR B

SUB C

JNZ LOOP2

MOV A, B

STA 301CH

HLT

Explanation:

Algorithm:

Taking N as the input, increment it to obtain N+1.
Multiply N with N+1.
Divide the obtained product obtained by 2.
Steps:

Load the data from the memory location (301BH, random choice) into the accumulator
Move the data into B
Increment the value in the accumulator by one and move it to the register C
Initialize the accumulator with 0
Multiplication step: Keep adding B to accumulator. The B has to be added equal number of times as the value of C
Initialize B with 00H. B will store the quotient of the division
Initialize C with 02H. This is the divisor for the division
Division step: Keep subtracting C from A till A becomes 0. For each subtraction, increment B by one
The final answer is in B. Move it to A. Then store the value of A in 301CH (again random choice)

Kindly revert for any queries

Thanks.