Eroare de compilare: user.c:1:21: error: algorithm: No such file or directory user.c:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’ user.c: In function ‘main’: user.c:19: warning: implicit declaration of function ‘freopen’ user.c:19: error: ‘stdin’ undeclared (first use in this function) user.c:19: error: (Each undeclared identifier is reported only once user.c:19: error: for each function it appears in.) user.c:20: error: ‘stdout’ undeclared (first use in this function) user.c:23: warning: implicit declaration of function ‘scanf’ user.c:23: warning: incompatible implicit declaration of built-in function ‘scanf’ user.c:25: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:25: note: use option -std=c99 or -std=gnu99 to compile your code user.c:29: error: redefinition of ‘i’ user.c:25: note: previous definition of ‘i’ was here user.c:29: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:34: error: redefinition of ‘i’ user.c:29: note: previous definition of ‘i’ was here user.c:34: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:38: warning: implicit declaration of function ‘printf’ user.c:38: warning: incompatible implicit declaration of built-in function ‘printf’