C Language Sixth time assignment

Job A:

1. Write the function int oddsum (int n) to calculate all the odd numbers in n integers and. The value of the n number is entered by the user from the keyboard.

#include <stdio.h>intMain () {intn,i,a,sum=0; printf ("you need to enter several numbers:"); scanf ("%d",&N);  for(i=1; i<=n;i++) {printf ("Please enter the number you entered:"); scanf ("%d",&a); if(a%2!=0) {sum=sum+A; }} printf ("n an odd number and is:%d", sum); return 0;} 

2. Write the function double Mypow (double x,int n) to calculate the n-th square of X (Note: the POW () function cannot be borrowed).

#include <stdio.h>DoubleMypow () {Doublex,y=1; intN,i; printf ("Please enter the base and index:"); scanf ("%lf%d",&x,&N);  for(i=1; i<=n;i++) y=y*x; printf ("%f", y);}intMain () {Mypow (); return 0;}

3. Write a function double cylinder (double r,double height) to calculate the volume of a cylinder with a radius of R and height.

#include <stdio.h>#include<math.h>#definePi 3.14Doublecylinder () {Doubler,h,v; printf ("Please enter radius and height:"); scanf ("%LF%LF",&r,&h); V=pi*pow (R,2)*h; printf ("the volume of the cylinder is:%f\n", v);}intMain () {cylinder (); return 0;}

Job B: Job Management system

#include <stdio.h>voidQues_1 () {printf ("1, max \ n"); printf ("2, ask m to n sum \ n"); printf ("3, averaging \ n");}voidques_2 () {printf ("C language theory homework \ n");}voidQues_3 () {printf ("1, 10 row triangle \ n"); printf ("2, 10 rows, 10 column rectangle \ n"); printf ("3, 10 rows inverted triangular shape \ n"); printf ("4, five grade results (a~e), output corresponding percentile score (0~100) zone \ n"); printf ("5, Fahrenheit temperature conversion Celsius temperature \ n"); printf ("6,100 m free fall \ n"); printf ("7, the value of the single-digit , 10-digit, and hundred digits of the output integer \ n"); printf ("8, segmented function \ n"); printf ("9, calculate deposit interest \ n"); printf ("10, step electricity price \ n"); }voidQues_4 () {printf ("1, guessing games/n"); printf ("2, greatest common divisor, least common multiple/n");}voidQues_5 () {printf ("1, after-school question 1/n"); printf ("2, after-school question 2/n"); printf ("3, after-school question 3/n"); printf ("4, after-school question 4/n"); printf ("5, after-school question 5/n"); printf ("6, use the double loop to print the triangle \ n"); }voidA () {intchoice; printf ("Please select a few jobs: \ n"); printf ("1, first assignment. \ n"); printf ("2, second assignment. \ n"); printf ("3, third job. \ n"); printf ("4, Fourth assignment. \ n"); printf ("5, Fifth assignment. \ n"); scanf ("%d",&choice); Switch(choice) { Case 1: Ques_1 ();  Break;  Case 2: Ques_2 ();  Break;  Case 3: Ques_3 ();  Break;  Case 4: Ques_4 ();  Break;  Case 5: Ques_5 ();  Break; default: printf ("The job does not exist.");  Break; } }intMain () {a (); return 0;}

This homework to do more laborious, in the editing process found a lot of problems, through the exchange with classmates to solve, there are some doubts, in the assignment B, do not know how to write the code written in printf, can not print the previous job, the remaining problems in the exchange with the students to be resolved.

C Language Sixth time assignment