View Compilation Error

1073736_0_0_30648.cpp:6: error: `main' must return `int'
1073736_0_0_30648.cpp: In function `int main(...)':
1073736_0_0_30648.cpp:13: error: `itoa' undeclared (first use this function)
1073736_0_0_30648.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)