2022-10-04 03:30:40

#include <stdio.h>
#include <conio.h>

int main()
{
float n;
printf("Nhap n = ");
scanf("%f", &n);

/*Bai1: Tính S(n) = 1 + 2 + 3 + … + n
int i, S;
i=0;
S=0;

while(i<=n) {
	S=S+i;
	i++;
}
*/

/*Bai2: Tính S(n) = 1^2 + 2^2 + 3^2 + … + n^2
int i, S;
i=0;
S=0;

do {
	S=S+i*i;
	i++;
} while(i<=n);
*/

/*Bai3: Tính S(n) = 1 + 1/2 + 1/3 + … + 1/n
float i, S;
S=0;
i=1;

for(;i<=n;i++) {
	S= S + 1/i;
}
*/

/*Bai4: Tính S(n) = 1/2 + 1/4 + … + 1/2n
float i, S;
S=0;
i=1;

for(;i<=n;i++) {
	S= S + (1/(2*i));	
}
*/

/*Bai5: Tính S(n) = 1 + 1/3 + 1/5 + … + 1/(2n+1)*/
float i, S;
S=1;
i=1;

while(i<=n) {
	S= S + (1/(2*i+1));
	i++;
}

printf("\nS = %0.1f",S);			

return 0;
}

2020-09-17 12:09:40

//bai 1 while:
	/*int n, i, S;
	printf("Nhap n = "); scanf("%d", &n);
	i=1;
	S=0;
	while (i<=n){
		S=S+i;
		i++;}
	printf("Tong S = %d",S);*/
//Bai 2 c2
/*int i, n, S;
printf("Nhap  n = "); scanf("%d",&n);
S=0;
for (i=0;i<=n;i++)
{S=S+i*i;}
printf("Tong S = %d",S);*/
//Bai 3 c2
/*float i, n, S;
printf("Nhap n = "); scanf("%f",&n);
i=1;
S=0;
do {S=S+1/i;
i++;}
while (i<=n);
printf("Tong S = %f",S);*/
//bai 4 c1	
	/*float i, n, S;
	printf("Nhap n = "); scanf("%f", &n);
	i=1;
	S=0;
	while (i<=n)
	{S=S+(1/(2*i));
	i++;}
	printf("Tong S = %f",S);*/
//Bai 5 for	
	float i, n, S;
	printf("Nhap n = "); scanf("%f",&n);
	S=0;
	for(i=1;i<=n;i++){
		S=S+(1/(2*i+1));}
	printf ("Tong S = %f",S);

2020-09-16 07:22:43

#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 n, i ,s = 0;
	
	printf("\nNhap n: ");
	scanf("%d", &n);
	
	while(i<=n){
		s = s + i;
		printf("\nTong s: %d", s);
		
	}
	do {
		s = s + 1;
		printf("\nTong s: %d", s);
		i++;
	}
	for(i = 1; i <= n; i++){
	
		s+ = i;
	    printf("\nTong s: %d", s);
	    
	}
	
	return 0;
}

2020-09-15 14:50:39

bai 2

#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 n;
	printf("\nnhap n: "); scanf("%d",&n);
	
	
	printf("\n==============cach 1");
	int S1;
	for(S1=0;S1<2;S1++){
		S1=(n*(n+1)*(2*n+1))/6;
		printf("\n tong la %d",S1);
	}
	printf("\n==============cach 2");
	int S2=0;
	do {
		S2=(n*(n+1)*(2*n+1))/6;
	} while(S2<2);
	     printf("\ntong la: %d",S2);
	     
	printf("\n==============cach 3");
	int S3=0;
	
	while(S3<2) {
			S3=(n*(n+1)*(2*n+1))/6;
			printf("\ntong la: %d",S3);
	}
	
	
		
	
	
	return 0;
}

2020-09-15 13:56:06

#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[]) {
	//bat dau code;
	//bai 1;
	int n;
	int i;
	int s = 0;
	printf("\nNhap n: ");
	scanf("%d", &n);
	
	while(i<=n) {
		s = s + i;
		printf("\nTong s: %d", s);
		
	}
	 
	do {
		s = s + 1;
		printf("\nTong s: %d", s);
		i++;
	}
	
	for(i = 1; i <= n; i++){
		s+=i;
		printf("nTong s: %d", s);
	}
	//ket thuc code;
	return 0;
}

2020-09-15 13:35:37

#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[]) {
	//bat dau code;
       //bai 3;
	int S = 0;
	int i = 1;
	int n;
	
	printf("\nNhap n =");
	scanf("%d", &n);
	
	for(i=1;i<=n;i++) {
	  tong = tong + 1 / i;
		
	}
	printf("Sn = %f", tong);
	
	while(i<=n) {
		tong = tong + 1 / i;
		i++;
	}
	printf("Sn = %f", tong);

	do {
		tong = tong + 1 / i;
		i++;
	}
	printf("Sn = %f", tong);
	//ket thuc code;
	return 0;
}

2020-09-15 13:27:31

#include<stdio.h>
#include<stdlib.h>
int main(){
//bat dau code;
//bai 2;
	float s=0, c=0, n;
	
	printf("\nNhap n: ");
        scanf("%f",&n);


	while (c <= n ){
	
		s= s +c*c;
		c++;	
	}
	printf("\nS(n)= %f",s);
	
	s=0; 
	c=0;
	do{
		s+=c*c;
		c++;
		
	}while(c<= (n) );
	printf("\nS(n)= %f",s);
   s=0; 

	for (int d=0; d <= n; d++){
		
    s+=d*d;
	}
	printf("\nS(n)= %f",s);

//ket thuc code;
	return 0;
}

2020-09-15 12:21:02

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
//bai4
int main(int argc, char *argv[]) {
	int i = 1, n;
	float s;
	s = 0;
	printf("\nnhap so n:");
	scanf("%d", &n);
	//for
	for(i = 1; i <= n; i++);
	{
		s = s + 1.0 / (2 * i);
		i++;
	}
	printf("Tong s:%f", s);
	//do...while
	do
	{
		s = s + 1.0 / (2 * i);
		i++;
	}
	while(i <= 1);
	{
		printf("Tong s:%f", s);
	}
	
	return 0;
}

2020-09-15 10:10:49

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
//bai3
int main(int argc, char *argv[]) {
	int i, n;
	float s;
	i = 1;
	s = 0;
	
	printf("\nnhap so n:");
	scanf("%d", &n);
	
	///while
	while(i <= n)
	{
		s = s + (1/i);
		i++;
	}
	printf("\nTong s:%f", &s);
	
	//Do..while
	do
	{
		s = s + 1/i;
		i++;
	}
	while(i <= n);
	{
	printf("\nTong s:%f", &s);
	}
	
    for(i = 1; i <= 1; i++);
    {
    	s = s + 1/i;
    	i++;
	}
	printf("\nTong s:%f", &s);
	return 0;
}

2020-09-15 09:42:54

	//bai 5
	float n, i, s5;
	printf("Nhap n: ");
	scanf("%f",&n);
	//sd for
	s5=0;
	for(i=0; i<=n; i++){
		s5 += (1/(i*2+1));
	}
	printf("s5 = %f",s5);

	//sd while
	s5=0;
	i=0;
	while(i<=n){
		s5+= (1/(i*2+1));
		i++;
	}
	printf("s5 = %f",s5); 
	//sd do...while
	s5=0;
	i=0;
	do{
		s5+=(1/(i*2+1));
		i++;
	}while(i<=n);
	printf("s5 = %f",s5);