By GokiSoft.com|
20:08 09/12/2021|
Lập Trình C
Ôn tập While, Do .. While, For lập trình C - Lập trình C
Sử dụng bằng 3 cách cho bài sau : sử dụng while, do .. while, for
Bài 1: Tính S(n) = 1 + 2 + 3 + … + n
Bài 2: Tính S(n) = 1^2 + 2^2 + … + n^2
Bài 3: Tính S(n) = 1 + ½ + 1/3 + … + 1/n
Bài 4: Tính S(n) = ½ + ¼ + … + 1/2n
Bài 5: Tính S(n) = 1 + 1/3 + 1/5 + … + 1/(2n + 1)
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Phản hồi từ học viên
5
(Dựa trên đánh giá ngày hôm nay)
![An Văn Minh [T2008A]](https://www.gravatar.com/avatar/e0f14efe4b11f7d9d5901e8802319c92.jpg?s=80&d=mm&r=g)
An Văn Minh
2020-09-15 08:36:33
//Baitap4
//=============================================
#include<stdio.h>
#include<math.h>
int main()
{
float i=1;
float n;
float s=0;
printf("\nNhap n=");
scanf("%f", &n);
//dung while
while(i<=n){
s=s+1/(2*i);
i++;
}
//dung do...while
do{
s=s+1/(2*i);
i++;
}
while(i<=n);
// dung for
for(float i=1;i<=n;i++){
s=s+1/(2*i);
}
printf("\nTong S(n)=%f", s);
return 0;
}
![Trần Văn Lâm [T2008A]](https://www.gravatar.com/avatar/cfc15c8cb7781ad669b013e01f9f1a6b.jpg?s=80&d=mm&r=g)
Trần Văn Lâm
2020-09-15 08:26:07
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
//bai 2
int i = 1, n, s = 0;
printf("\nNhap so n:");
scanf("%d", n);
//For
for(i = 1; i <=n ; i++)
s += i*i;
printf("\nTong s:%d", s);
//While
while(i <= n)
{
s += i*i;
printf("\nTong s:%d", s);
i++;
}
//Do...While
do
{
s += i*i;
i++;
}
while(i <= n);
{
printf("\nTong s:%d", s);
}
return 0;
}
![An Văn Minh [T2008A]](https://www.gravatar.com/avatar/e0f14efe4b11f7d9d5901e8802319c92.jpg?s=80&d=mm&r=g)
An Văn Minh
2020-09-15 08:07:34
//Baitap3
//=============================================
#include<stdio.h>
#include<math.h>
int main()
{
float i=1;
float n;
float s=0;
printf("\nNhap n=");
scanf("%f", &n);
//dung while
while(i<=n){
s=s+(1/i);
i++;
}
//dung do...while
do{
s=s+1/i;
i++;
}
while(i<=n);
dung for
for(float i=1;i<=n;i++){
s=s+1/i;
}
printf("\nTong S(n)=%f", s);
return 0;
}
![Trần Văn Lâm [T2008A]](https://www.gravatar.com/avatar/cfc15c8cb7781ad669b013e01f9f1a6b.jpg?s=80&d=mm&r=g)
Trần Văn Lâm
2020-09-15 07:47:24
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
//bai 1
int i = 1, n, s = 0;
printf("\nNhap n=");
scanf("%d", n);
//While
while(i <= n){
s = s + i;
printf("\nTong s la:%d", s);
}
//Do...Whlie
do{
s = s + i;
i++;
}while(i <= n);printf("\nTong s la:%d", s);
///For
for(i = 1; i <= n; i++){
s+=i;
printf("\nTong s la:%d", s);
}
return 0;
![Triệu Văn Lăng [T2008A]](https://www.gravatar.com/avatar/1348e3562c6492c26f796cb1f45982a1.jpg?s=80&d=mm&r=g)
Triệu Văn Lăng
2020-09-15 05:11:50
bài 1
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
int S1=0, S2=0, S3=0, n;
printf("\nnhap n: "); scanf("%d",&n);
//dung for
printf("\n==========cach 1");
int t;
for(t=0;t<=n;t++) {
S1+=t;
printf("\nket qua: %d",S1);}
//dung while
printf("\n==========cach 2");
int i=1;
while(i<=n) {
S2=S2+i;
i++;
printf("\nket qua: %d",S2);}
//dung do..while
printf("\n==========cach 3");
int k=1;
do {
S3=S3+k;
k++;} while(k<=n); printf("\nket qua: %d",S3);
return 0;
}
![vuong huu phu [T2008A]](https://www.gravatar.com/avatar/307a5cf29780afab49706dc8b15b86c6.jpg?s=80&d=mm&r=g)
vuong huu phu
2020-09-15 04:26:26
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
//bai 5
//cach 1 for
int n,i;
float t;
i=1;
t=0;
printf("\n nhap so n la ");
scanf("%d",&n);
for (i=1;i<=n;i++){
t=t+(1/(2*i+1));
printf("\n so n la %f",t);
}
//cach 2 while
int n,i;
float t;
i=1;
t=0;
printf("\n nhap so n la ");
scanf("%d",&n);
while (i<=n) {
t=t+(1/(2*i+1));
i++;
printf("\n so n la: %d",t);
}
//cach 3 do while
int n,i;
float t;
i=1;
t=0;
printf("\n nhap so n la ");
scanf("%d",&n);
do{
t=t+(1/(2*i+1));
i++;
}
while (i<=n);
printf("\n so n la: %d",t);
return 0;
}
![Nguyễn Hữu Hiếu [T2008A]](https://www.gravatar.com/avatar/ca2884508b617fee77f000c7d99c219d.jpg?s=80&d=mm&r=g)
Nguyễn Hữu Hiếu
2020-09-15 04:18:18
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
//Bai 5
float i,n,tong;
tong = 0;
printf("Nhap n = ");
scanf("%f", &n);
for(i=0;i<=n;i++) {
tong = tong + 1/(2*i+1);
}
printf("Sn = %f", tong);
return 0;
}
![Nguyễn Hữu Hiếu [T2008A]](https://www.gravatar.com/avatar/ca2884508b617fee77f000c7d99c219d.jpg?s=80&d=mm&r=g)
Nguyễn Hữu Hiếu
2020-09-15 04:11:21
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
//Bai 4
float i,n,tong;
printf("Nhap n= ");
scanf("%f", &n);
i = 1;
for(i=1;i<=n;i++) {
tong = tong + 1/(2*i);
}
printf("Sn = %f", tong);
return 0;
}
![An Văn Minh [T2008A]](https://www.gravatar.com/avatar/e0f14efe4b11f7d9d5901e8802319c92.jpg?s=80&d=mm&r=g)
An Văn Minh
2020-09-15 03:46:50
//Baitap2:
#include<stdio.h>
#include<math.h>
int main()
{
int i=1;
int n;
int s=0;
printf("\nNhap n=");
scanf("%d", &n);
//dung while
while(i<=n){
s=s+(i*i);
i++;
}
//dung do...while
do{
s=s+i*i;
i++;
}
while(i<=n);
//dung for
for(int i=1;i<=n;i++){
s=s+i*i;
}
printf("\nTong S(n)=%d", s);
return 0;
}
![vuong huu phu [T2008A]](https://www.gravatar.com/avatar/307a5cf29780afab49706dc8b15b86c6.jpg?s=80&d=mm&r=g)
vuong huu phu
2020-09-15 03:38:09
#include <stdio.h>
#include <stdlib.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char *argv[]) {
//S(n) = ½ + ¼ + … + 1/2n
//cach 1 for
int n,i;
float t;
t=0 ;
i=1;
printf(" nhap so n = ");
scanf("%d",&n);
for (i=1;i<=n;i++) {
t=t+1.0/2*i;
printf("\n so n la: %f",t);
}
//cach 2 while
int n,i;
float t;
t=0;
i=1;
printf (" nhap so n ");
scanf("%d",&n);
while (i<=n){
t=t+1,0/2*i;
i++;
printf("\n so n la %f",t);
}
//cach 3 do while
int n,i;
float t;
i=1;
t=0;
printf (" nhap so n ");
scanf("%d",&n);
do{
t=t+1.0/2*i;
i++;
} while (i<=n);
printf("\n so n la %f",t);
return 0;
}