03 Example Programs(Các chương trình ví dụ)

Program to convert A to B:

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#include <iostream> using namespace std; int main() { float A; float B; cout<<"Enter A = "; cin>> A; B = A * 3.14; cout<<"Result B = "<< B; return 0; }

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Program to add two numbers:

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#include <iostream> using namespace std; int main() { int a, b, c; cout<<endl<<"Enter a and b: "; cin>> a>> b; c = a + b; // -, * , / with type float cout<<"Result c = "<< c; return 0; }

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Program to swap two numbers:
Cách 1:

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#include <iostream> using namespace std; int main() { int i, j, g; i = 4; j = 7; cout<<"values before swapping: "<<i<<" "<<j<<endl; g = i; i = j; j = g; cout<<"values after swapping: "<<i<<" "<<j; return 0; }

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Cách 2:

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#include <iostream> using namespace std; int main() { int i, j, g; i = 4; j = 7; cout<<"values before swapping: "<<i<<" "<<j<<endl; g = i * j; i = g / i; j = g / i; cout<<"values after swapping: "<<i<<" "<<j; return 0; }

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Cách 3:

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#include <iostream> using namespace std; int main() { int i, j, g; i = 4; j = 7; cout<<"values before swapping: "<<i<<" "<<j<<endl; i = i * j; // 4*7 j = i / j; // 4*7 / 7 = 4 i = i / j; // 4*7 / 4 = 7 cout<<"values after swapping: "<<i<<" "<<j; return 0; }

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Cách 4:

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#include <iostream> using namespace std; int main() { int i, j, g; i = 4; j = 7; cout<<"values before swapping: "<<i<<" "<<j<<endl; g = i + j; i = g - i; j = g - i; cout<<"values after swapping: "<<i<<" "<<j; return 0; }

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Cách 5:

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#include <iostream> using namespace std; int main() { int i, j, g; i = 4; j = 7; cout<<"values before swapping: "<<i<<" "<<j<<endl; i = i + j; //4+7 = 11 j = i - j; // 11 - 7 = 4 i = i - j; cout<<"values after swapping: "<<i<<" "<<j; return 0; }

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Program printing the name and age:

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#include <iostream> using namespace std; int main() { char name[10]; int age; cout<<"Enter the name: "; cin>>name; cout<<"Enter the age: "; cin>>age; cout<<"The name of the person is "<<name<<" and the age is "<<age; return 0; }

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