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#include <iostream>
using namespace std;
 
int main() {
   int a,b,c;
   cout << " Ingrese tres numeros. ";
   cin >>a>>b>>c = (a+b > c) + (a+c > b)  + (b+c >a);
 
   switch(a,b,c) {
 
   case  true:
	   cout << num << " forma un triangulo./n ";
       break;
   switch (a+b>c)
	   cout << " es escaleno";
   switch (a=b=c)
	   cout << "es equilatero";
   switch(a==b && b!=c)
	   cout<<"es isosseles";
	 case false:
       cout << num << " no forma un triangulo/n ";
       break;
 
   }
   cin.ignore();
   cin.get();
}

prog.cob:1: Warning: Invalid indicator 'n' at column 7
prog.cob:5: Warning: Invalid indicator 't' at column 7
prog.cob:7: Warning: Invalid indicator 't' at column 7
prog.cob:9: Warning: Invalid indicator 'e' at column 7
prog.cob:13: Warning: Invalid indicator 't' at column 7
prog.cob:15: Warning: Invalid indicator 't' at column 7
prog.cob:17: Warning: Invalid indicator 't' at column 7
prog.cob:22: Warning: Invalid indicator '.' at column 7
prog.cob:25: Warning: Invalid indicator '.' at column 7
prog.cob:26: Warning: File not terminated by a newline
prog.cob:28: Error: syntax error

Standard output is empty