View Compilation Error

0_0_12178112_5624.cpp: In function `int main()':
0_0_12178112_5624.cpp:51: error: `n' undeclared (first use this function)
0_0_12178112_5624.cpp:51: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12178112_5624.cpp:54: error: `t' undeclared (first use this function)
0_0_12178112_5624.cpp:55: error: `m' undeclared (first use this function)
0_0_12178112_5624.cpp:56: error: `res' undeclared (first use this function)
0_0_12178112_5624.cpp: At global scope:
0_0_12178112_5624.cpp:62: error: expected declaration before '}' token