COBOL 四則演算 ADD A B GIVING C : COMPUTE C = A + B ADD A TO B : COMPUTE B = A + B SUBTRACT A FROM B : COMPUTE B = B - A SUBTRACT A FROM B GIVING C : COMPUTE C = B - A MULTIPLY A BY B GIVING C : COMPUTE C = A * B DIVIDE A BY B GIVING C REMAINDER D : COMPUTE C = A / B 余り D