Creio que fiz algo errado, mas aparece isso: 
  
$gcc main.c -o demo -lm -pthread -lgmp -lreadline 2>&1 
main.c: In function ‘main’: 
main.c:6:22: warning: extra tokens at end of #include directive [enabled by default] 
#include <stdio.h> int main() 
^ 
main.c:8:43: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token 
{ int i = 873; double f = 12.94536; char s*+ = “ Feliz Aniversário “ 
^ 
main.c:8:46: error: expected expression before ‘=’ token 
{ int i = 873; double f = 12.94536; char s*+ = “ Feliz Aniversário “ 
^ 
main.c:8:46: error: stray ‘\342’ in program 
main.c:8:46: error: stray ‘\200’ in program 
main.c:8:46: error: stray ‘\234’ in program 
main.c:8:52: error: ‘Feliz’ undeclared (first use in this function) 
{ int i = 873; double f = 12.94536; char s*+ = “ Feliz Aniversário “ 
^ 
main.c:8:52: note: each undeclared identifier is reported only once for each function it appears in 
main.c:8:46: error: stray ‘\303’ in program 
{ int i = 873; double f = 12.94536; char s*+ = “ Feliz Aniversário “ 
^ 
main.c:8:46: error: stray ‘\241’ in program 
main.c:8:46: error: stray ‘\342’ in program 
main.c:8:46: error: stray ‘\200’ in program 
main.c:8:46: error: stray ‘\234’ in program 
main.c:10:1: error: stray ‘\342’ in program 
printf; printf(“ t %.4d n t %.9d n n ”, i, i) 
^ 
main.c:10:1: error: stray ‘\200’ in program 
main.c:10:1: error: stray ‘\234’ in program 
main.c:10:20: error: ‘t’ undeclared (first use in this function) 
printf; printf(“ t %.4d n t %.9d n n ”, i, i) 
^ 
main.c:10:27: error: expected ‘)’ before ‘n’ 
printf; printf(“ t %.4d n t %.9d n n ”, i, i) 
^ 
main.c:10:27: error: stray ‘\342’ in program 
main.c:10:27: error: stray ‘\200’ in program 
main.c:10:27: error: stray ‘\235’ in program 
main.c:12:1: error: expected ‘;’ before ‘printf’ 
printf; printf(“ t %.3f n t %.3e n t %.3g n n ”, f, f, f) 
^ 
main.c:12:1: error: stray ‘\342’ in program 
main.c:12:1: error: stray ‘\200’ in program 
main.c:12:1: error: stray ‘\234’ in program 
main.c:12:27: error: expected ‘)’ before ‘n’ 
printf; printf(“ t %.3f n t %.3e n t %.3g n n ”, f, f, f) 
^ 
main.c:12:32: error: exponent has no digits 
printf; printf(“ t %.3f n t %.3e n t %.3g n n ”, f, f, f) 
^ 
main.c:12:41: error: invalid suffix "g" on floating constant 
printf; printf(“ t %.3f n t %.3e n t %.3g n n ”, f, f, f) 
^ 
main.c:12:27: error: stray ‘\342’ in program 
printf; printf(“ t %.3f n t %.3e n t %.3g n n ”, f, f, f) 
^ 
main.c:12:27: error: stray ‘\200’ in program 
main.c:12:27: error: stray ‘\235’ in program 
main.c:14:1: error: expected ‘;’ before ‘printf’ 
printf 
^ 
main.c:16:1: error: stray ‘\342’ in program 
printf(“ t %.11s n”, s); return 0; } 
^ 
main.c:16:1: error: stray ‘\200’ in program 
main.c:16:1: error: stray ‘\234’ in program 
main.c:16:15: error: invalid suffix "s" on floating constant 
printf(“ t %.11s n”, s); return 0; } 
^ 
main.c:16:1: error: stray ‘\342’ in program 
printf(“ t %.11s n”, s); return 0; } 
^ 
main.c:16:1: error: stray ‘\200’ in program 
main.c:16:1: error: stray ‘\235’ in program 
main.c: At top level: 
main.c:19:1: error: expected identifier or ‘(’ before ‘}’ token 
} 
^