View Compilation Error

77973_0_16665.cpp: In function `int main()':
77973_0_16665.cpp:5: error: `n' undeclared (first use this function)
77973_0_16665.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
77973_0_16665.cpp:5: error: `m' undeclared (first use this function)
77973_0_16665.cpp:7: error: `i' undeclared (first use this function)
77973_0_16665.cpp:25: error: `j' undeclared (first use this function)
77973_0_16665.cpp:27: error: missing terminating " character
77973_0_16665.cpp:28: error: expected primary-expression before "for"
77973_0_16665.cpp:28: error: expected `;' before ')' token