View Compilation Error

0_0_3034926_21781.cpp: In function `int main()':
0_0_3034926_21781.cpp:10: error: `strlen' undeclared (first use this function)
0_0_3034926_21781.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3034926_21781.cpp:31: error: expected `;' before ')' token
0_0_3034926_21781.cpp:31: error: expected `;' before ')' token
0_0_3034926_21781.cpp: At global scope:
0_0_3034926_21781.cpp:48: error: expected unqualified-id before "return"
0_0_3034926_21781.cpp:48: error: expected `,' or `;' before "return"
0_0_3034926_21781.cpp:50: error: expected declaration before '}' token