View Compilation Error

0_0_8401706_30873.c: In function `main':
0_0_8401706_30873.c:5: error: syntax error before "int"
0_0_8401706_30873.c:6: error: `n' undeclared (first use in this function)
0_0_8401706_30873.c:6: error: (Each undeclared identifier is reported only once
0_0_8401706_30873.c:6: error: for each function it appears in.)
0_0_8401706_30873.c:8: error: `tel' undeclared (first use in this function)
0_0_8401706_30873.c:9: error: `tel1' undeclared (first use in this function)
0_0_8401706_30873.c:10: error: `val' undeclared (first use in this function)