View Compilation Error

149636_0_28276.cpp: In function `int main()':
149636_0_28276.cpp:51: error: no match for 'operator<<' in 'std::cin << t'
149636_0_28276.cpp:54: error: no match for 'operator<<' in 'std::cin << str1'
149636_0_28276.cpp:58: error: `plus' undeclared (first use this function)
149636_0_28276.cpp:58: error: (Each undeclared identifier is reported only once for each function it appears in.)
149636_0_28276.cpp:60: error: expected `;' before string constant
149636_0_28276.cpp:60: error: missing terminating " character