View Compilation Error

136915_0_11840.c:2:22: algorithm.h: No such file or directory
136915_0_11840.c:11: error: syntax error before "a"
136915_0_11840.c: In function `cmp':
136915_0_11840.c:13: error: `a' undeclared (first use in this function)
136915_0_11840.c:13: error: (Each undeclared identifier is reported only once
136915_0_11840.c:13: error: for each function it appears in.)
136915_0_11840.c:13: error: `b' undeclared (first use in this function)
136915_0_11840.c: In function `main':
136915_0_11840.c:48: error: syntax error before ';' token
136915_0_11840.c:50: error: structure has no member named `y'