View Compilation Error

0_0_28920933_31306.c:5:9: error: unknown type name 'fir'
 int dis(fir x , fir y){
         ^
0_0_28920933_31306.c:5:17: error: unknown type name 'fir'
 int dis(fir x , fir y){
                 ^
0_0_28920933_31306.c:8:9: error: unknown type name 'fir'
 int min(fir x){
         ^
0_0_28920933_31306.c:20:8: error: unknown type name 'fir'
 int ok(fir x, fir y){
        ^
0_0_28920933_31306.c:20:15: error: unknown type name 'fir'
 int ok(fir x, fir y){
               ^