1 #ifdef HAVE_STDLIB_H 2 #include <stdlib.h> 3 #endif 4 #include <math.h> 5 #include "yagi.h" 6 ci(double x)7 double ci(double x) /* cosine integral */ 8 { 9 double null, result; 10 11 cisi(x, &result, &null); 12 return(result); 13 } 14