Eroare de compilare: user.c:2:18: error: fstream: No such file or directory user.c:3:17: error: vector: No such file or directory user.c:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’ user.c:5: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘in’ user.c:6: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘out’ user.c:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘viz’ user.c:10: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token user.c: In function ‘main’: user.c:18: error: ‘viz’ undeclared (first use in this function) user.c:18: error: (Each undeclared identifier is reported only once user.c:18: error: for each function it appears in.) user.c:18: error: ‘false’ undeclared (first use in this function) user.c:24: error: ‘out’ undeclared (first use in this function) user.c: In function ‘citire’: user.c:31: error: ‘in’ undeclared (first use in this function) user.c:35: error: ‘a’ undeclared (first use in this function) user.c: In function ‘dfs’: user.c:41: error: ‘viz’ undeclared (first use in this function) user.c:41: error: ‘true’ undeclared (first use in this function) user.c:43: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:43: note: use option -std=c99 or -std=gnu99 to compile your code user.c:43: error: ‘a’ undeclared (first use in this function)