View Compilation Error

0_0_33346420_2386.cpp:4:1: error: 'int_t' does not name a type
 int_t _exEuclid(int_t a,int_t b,int_t&x,int_t&y){
 ^
0_0_33346420_2386.cpp:21:1: error: 'int_t' does not name a type
 int_t _inv(int_t a,int_t p){
 ^
0_0_33346420_2386.cpp:31:1: error: 'int_t' does not name a type
 int_t CRT( int n ,int_t  *remain, int_t *mod){
 ^