Generally, when we write program in Linux operating system for GCC compiler, it needs'std'namespace in the program. We use it by writing using namespacestd; then we can access any of the object likecout,cinwithout usingstd, but if we do not use using namespace std; then we should use...
getline(str,80); //take a string cout << "You have entered:\n"; cout << x << endl; cout << str << endl; } Output Enter a number and a string: 8 You have entered: 8 There are two cin statements for integer and string, but only number is taken. When we press enter key,...
What is cin c++variables 18th Sep 2017, 3:02 PM anshuman shukla + 7 Cin is used for input in C++ cin is C input Cout is C output 18th Sep 2017, 3:11 PM Manual + 3 Cross-reference definition of 'cout' from language author:http://www.stroustrup.com/bs_faq2.html#cout...
std::cout << "Enter the width of the rectangle: "; std::cin >> width; Rectangle rect(length, width); // Call the friend function to calculate the area double area = calculateArea(rect); std::cout << "The area of the rectangle is: " << area << std::endl return 0;} Output:...
c++cout 2nd Oct 2016, 12:39 PM HACKERMAN + 1 string str; getline(cin, str); 2nd Oct 2016, 1:19 PM kiwiyou + 1 so #include <iostream> using namespace std; int main() { cout << "Hello World"; return 0; } string str; getline(cin, str); ...
using std::cin; using std::cout; using std::endl; using std::runtime_error; int main(void){ for (int i, j;cin >> i >> j; ){ try { if (j == 0) throw runtime_error("divisor is 0"); cout << i / j << endl;} ...
main.c #include<stdio.h>intmain(){printf("Hello world\n");return0; } main.cpp #include<iostream>intmain(){ std::cout<<"Hello world"<<std::endl;return0; } When I compile them in godbolt to assembly, the size of the C code is only 9 lines (gcc -O3): ...
Jan 27, 2010 at 9:05am helios(17607) charch ='a'; 1 2 3 4 5 6 7 8 #include <iostream>intmain() {charc; std::cin >>c ; std::cout <<"the value of '"<<c<<"' is "<<int(c)<<'\n'; } Edit & run on cpp.sh ...
某植物等位基因G和g影响花瓣的大小，基因型GG表现为大花瓣，Gg表现为小花瓣，gg表现为无花瓣.另有一对同源染色体上的一对等位基因R和r影响花瓣的颜色，基因型RR和Rr表现为红色花瓣，rr表现为无色花瓣.两个双杂合子植株杂交，则下一代表现型有几种（ ）
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