View Compilation Error

0_0_9790112_17056.cpp:37: error: redefinition of `int mat[121][121]'
0_0_9790112_17056.cpp:4: error: `int mat[121][121]' previously declared here
0_0_9790112_17056.cpp: In function `void mat_init()':
0_0_9790112_17056.cpp:39: error: redefinition of `void mat_init()'
0_0_9790112_17056.cpp:6: error: `void mat_init()' previously defined here
0_0_9790112_17056.cpp: In function `int main()':
0_0_9790112_17056.cpp:60: error: redefinition of `int main()'
0_0_9790112_17056.cpp:27: error: `int main()' previously defined here