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#include <iostream>
using namespace std;
 
int main() {
 
// programa que recebe 3 coeficientes e retorna sua raiz 
 
	int a, b, c ;
	float numero;
 
	cout << " Digite o valor de a:";
		cin >> a;
	cout << " digite o valor de b:";
		cin >> b;
	cout << "digite o valor de c";
		cin >> c;
 
	cout << "A raiz quadrada de:" << a << " e " << sqrt (a) << endl;
	cout << "A raiz quadrada de:" << b << " e " << sqrt (b) << endl;
	cout << "A raiz quadrada de:" << c << " e " << sqrt (c) << endl;
 
 
}

prog.cpp: In function 'int main()':
prog.cpp:18:56: error: 'sqrt' was not declared in this scope
  cout << "A raiz quadrada de:" << a << " e " << sqrt (a) << endl;
                                                        ^

Standard output is empty