View Compilation Error

0_0_6030467_19764.cpp: In function `void fun1(int, int)':
0_0_6030467_19764.cpp:9: error: `fun2' undeclared (first use this function)
0_0_6030467_19764.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6030467_19764.cpp: In function `int fun2(int)':
0_0_6030467_19764.cpp:26: error: `int fun2(int)' used prior to declaration