0_0_7593909_10282.c: In function `main':
0_0_7593909_10282.c:5: error: `doublex1' undeclared (first use in this function)
0_0_7593909_10282.c:5: error: (Each undeclared identifier is reported only once
0_0_7593909_10282.c:5: error: for each function it appears in.)
0_0_7593909_10282.c:5: error: `x2' undeclared (first use in this function)
0_0_7593909_10282.c:5: error: `y1' undeclared (first use in this function)
0_0_7593909_10282.c:5: error: `y2' undeclared (first use in this function)
0_0_7593909_10282.c:5: error: `di' undeclared (first use in this function)
0_0_7593909_10282.c:6: error: `x1' undeclared (first use in this function)
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