View Compilation Error

0_0_4370344_5686.cpp: In function `int main()':
0_0_4370344_5686.cpp:84: error: jump to case label
0_0_4370344_5686.cpp:81: error:   crosses initialization of `int n1'
0_0_4370344_5686.cpp:90: error: redeclaration of `int n1'
0_0_4370344_5686.cpp:81: error: `int n1' previously declared here