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usingSystem;
 
usingSystem.Collections.Generic;
 
usingSystem.Linq;
 
usingSystem.Text;
 
usingSystem.Threading.Tasks;
 
namespace ConsoleApplication36
 
{
 
classProgram
 
{
 
staticvoidMain(string[] args)
 
{
 
double x, S, h, Integ, a, b, n;
 
a = 0; b = 3; n = 100; S = 0;
 
h = (b - a) / n;
 
for (x = a; x <= (b - h); x += h)
 
S += Math.Asin(Math.Sqrt(x / (1 + x)));
 
Integ = h * S;
 
Console.WriteLine("Iнтеграл = " + Integ);
 
Console.ReadKey();
 
}
 
}
 
}

prog.c:1:1: warning: data definition has no type or storage class
 usingSystem;
 ^~~~~~~~~~~
prog.c:1:1: warning: type defaults to ‘int’ in declaration of ‘usingSystem’ [-Wimplicit-int]
prog.c:3:12: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
 usingSystem.Collections.Generic;
            ^
prog.c:5:12: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
 usingSystem.Linq;
            ^
prog.c:7:12: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
 usingSystem.Text;
            ^
prog.c:9:12: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
 usingSystem.Threading.Tasks;
            ^
prog.c:11:1: error: unknown type name ‘namespace’
 namespace ConsoleApplication36
 ^~~~~~~~~
prog.c:13:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^

Standard output is empty