Câu 1:
*Code:
#include <stdio.h>
#include <math.h>
int is_valid_triangle(double a, double b, double c) {
if (a <= 0 || b <= 0 || c <= 0) {
return 0;
}
if (a + b < c || a + c < b || b + c < a) {
return 0;
}
return 1;
}
double calculate_triangle_area(double a, double b, double c) {
if (!is_valid_triangle(a, b, c)) {
return 0;
}
double semi_perimeter = (a + b + c) / 2;
double area = sqrt(semi_perimeter * (semi_perimeter - a) * (semi_perimeter - b) * (semi_perimeter c));
return area;
}
int main() {
double a, b, c;
printf("Enter the first side of the triangle: ");
scanf("%lf", &a);
printf("Enter the second side of the triangle: ");
scanf("%lf", &b);
printf("Enter the third side of the triangle: ");
scanf("%lf", &c);
if (!is_valid_triangle(a, b, c)) {
printf("The sides are not valid triangle sides.\n");
return 1;
}
double area = calculate_triangle_area(a, b, c);
printf("The area of the triangle is: %.2f\n", area);
return 0;
}
*Terminal:
(Test case đúng)
tin@tin:~$ gcc lab03.c -o lab03.o -lm
tin@tin:~$ ./lab03.o
SE1803_CE180025_BuiVoTrungTin
Enter the first side of the triangle: 3
Enter the second side of the triangle: 4
Enter the third side of the triangle: 5
The area of the triangle is: 6.00
(Test case sai)
tin@tin:~$ gcc lab03.c -o lab03.o -lm
tin@tin:~$ ./lab03.o
SE1803_CE180025_BuiVoTrungTin
Enter the first side of the triangle: 1
Enter the second side of the triangle: 2
Enter the third side of the triangle: 7
The sides are not valid triangle sides.
Câu 2:
*Code:
#include <stdio.h>
#include <string.h>
int main()
{
printf("SE1803_CE180025_BuiVoTrungTin\n");
char s[501];
int n, i;
printf("Nhap chuoi sau: ");
scanf("%[^\n]", s);
n=strlen(s);
printf("Chuoi co: %d ky tu\n", n);
printf("Chuoi da chuan hoa: ");
for (i=0; i<n; ++i)
{
printf("%c", s[n - i - 1]);
}
printf("\n");
return 0;
}
*Terminal:
tin@tin:~$ gcc lab03_2.c -o lab03_2.o -lm
tin@tin:~$ ./lab03_2.o
SE1803_CE180025_BuiVoTrungTin
Nhap chuoi sau: truongdaihocfpt
Chuoi co: 15 ky tu
Chuoi da chuan hoa: tpfcohiadgnourt