自定义 #include using namespace std;

void print() { cout<<"********"<<endl<<"informaintion"<<endl;

}

int main() { int n; cin>>n; for(int i=0;i<n;i++) { print(); } }

双数型 #include using namespace std; float f(float x,float y) { return (x+y); } int main() { float x,y; cin>>x>>y; cout<<f(x,y); return 0; }

四则运算 #include using namespace std; float f(float x,float y) { return (x+y); } float s(float x,float y) { return (x-y); } float t(float x,float y) { return (x*y); } float c(float x,float y) { return (x/y); } int main() { float x,y; cin>>x>>y; cout<<f(x,y)<<endl<<s(x,y)<<endl<<t(x,y)<<endl<<c(x,y); return 0; }

周长面积 #include using namespace std; float z(float r) { return (r23.14); } float m(float r) { return (rr3.14); } int main() { //还需声明 复制粘贴float z(float r) float r; cin>>r; cout<<z(r)<<endl<<m(r); }

素数 #include using namespace std; int sushu(int n) { int m=1; for(int i=2;i<n;i++) { if(n%i==0){m=0;break;} } return m; }

int main() { int num; cin>>num; if(sushu(num)==0){cout<<"no"<<endl;} else{cout<<"yes"<<endl;} }