View Compilation Error

0_0_15343124_1250.cpp: In function 'int main()':
0_0_15343124_1250.cpp:4:1: error: 'doulbe' was not declared in this scope
 doulbe x1,x2,y1,y2;
 ^
0_0_15343124_1250.cpp:5:32: error: 'x1' was not declared in this scope
 while(scanf("%lf %lf %lf %lf",&x1,x2,y1,y2)!=EOF){
                                ^
0_0_15343124_1250.cpp:5:35: error: 'x2' was not declared in this scope
 while(scanf("%lf %lf %lf %lf",&x1,x2,y1,y2)!=EOF){
                                   ^
0_0_15343124_1250.cpp:5:38: error: 'y1' was not declared in this scope
 while(scanf("%lf %lf %lf %lf",&x1,x2,y1,y2)!=EOF){
                                      ^
0_0_15343124_1250.cpp:5:41: error: 'y2' was not declared in this scope
 while(scanf("%lf %lf %lf %lf",&x1,x2,y1,y2)!=EOF){
                                         ^
0_0_15343124_1250.cpp:6:53: error: 'sprt' was not declared in this scope
 printf("%.2f\n",sprt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)));
                                                     ^