View Compilation Error

666656_0_0_2510.cpp:2: error: expected nested-name-specifier before "namespce"
666656_0_0_2510.cpp:2: error: `namespce' has not been declared
666656_0_0_2510.cpp:2: error: expected `;' before "std"
666656_0_0_2510.cpp:2: error: expected constructor, destructor, or type conversion before ';' token
666656_0_0_2510.cpp: In function `int main()':
666656_0_0_2510.cpp:5: error: `cin' undeclared (first use this function)
666656_0_0_2510.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
666656_0_0_2510.cpp:5: error: `a' undeclared (first use this function)
666656_0_0_2510.cpp:5: error: `b' undeclared (first use this function)
666656_0_0_2510.cpp:6: error: `cout' undeclared (first use this function)
666656_0_0_2510.cpp:6: error: `endl' undeclared (first use this function)
666656_0_0_2510.cpp:7: error: `return0' undeclared (first use this function)