View Compilation Error

0_0_3239912_28617.cpp: In function `int main()':
0_0_3239912_28617.cpp:4: error: `doulbe' undeclared (first use this function)
0_0_3239912_28617.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3239912_28617.cpp:4: error: expected `;' before "x1"
0_0_3239912_28617.cpp:5: error: `x1' undeclared (first use this function)
0_0_3239912_28617.cpp:5: error: `y1' undeclared (first use this function)
0_0_3239912_28617.cpp:5: error: `x2' undeclared (first use this function)
0_0_3239912_28617.cpp:5: error: `y2' undeclared (first use this function)
0_0_3239912_28617.cpp:7: error: `result' undeclared (first use this function)