View Compilation Error

0_0_3081770_20835.cpp: In function `void mian()':
0_0_3081770_20835.cpp:5: error: `string' undeclared (first use this function)
0_0_3081770_20835.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3081770_20835.cpp:5: error: expected `;' before "s"
0_0_3081770_20835.cpp:6: error: `s' undeclared (first use this function)