C++ programs

1_1_FACT - Find factorial of a number.
1_2_NCR - Find combination (nCr).
1_3_LCM - Find LCM of 2 numbers.
1_4_SERI - Find output of ( 1+ x^2/2!+ x^4/4!+...x^n/n! ) for particular x and n.
1_5_SERI - Find output of ( 1- x/2!+ x^2/3!-...x^n/n! ) for particular x and n.
1_6_SERI - Find output of ( 1-2+3-4.....n ) for particular x and n.
1_7_MAXM - Find maximum and minimum out of 10 numbers.

2_1_STAR - Create a staircase star pattern.
2_2_STAR - Create a pyramid star pattern.
2_3_PATT - Create a number pattern.
2_4_QUAD - solving quadratic equation
2_5_PASCALST - Create pascal's triangle.
2_6_STAR - Create a star pattern.
2_7_CALC - Calculator of operations +,-,/,*
2_8_NUMC - Count numbers of 0s, positive and negative numbers entered.
2_9_SUMA - Calculate sum and average of numbers entered.

3_1_4DIG - Calculate sum of digits of a 4digit number.
3_2_base - Menu based conversion from base decimal to octal/binary/hexadecimal.
3_3_ZERO - Count number of 0s in digit entered.
3_5_STAR - Create a star pattern.
3_6_FREQ - Calculate frequency of 0-9 in list of 20 numbers.
3_8_EVEN - Count number of even and odd numbers in the list of entered numbers.