View Compilation Error

0_0_1758869_30183.c: In function `cmp':
0_0_1758869_30183.c:10: error: `FM' undeclared (first use in this function)
0_0_1758869_30183.c:10: error: (Each undeclared identifier is reported only once
0_0_1758869_30183.c:10: error: for each function it appears in.)
0_0_1758869_30183.c:10: error: syntax error before ')' token
0_0_1758869_30183.c:10: error: syntax error before ')' token
0_0_1758869_30183.c: In function `main':
0_0_1758869_30183.c:14: error: `FM' undeclared (first use in this function)
0_0_1758869_30183.c:14: error: syntax error before "fm"
0_0_1758869_30183.c:21: error: `fm' undeclared (first use in this function)
0_0_1758869_30183.c:22: error: syntax error before "double"