prog.cpp:1:27: error: SFML/System.hpp: No such file or directory
prog.cpp: In function ‘int main()’:
prog.cpp:6: error: ‘sf’ has not been declared
prog.cpp:6: error: expected `;' before ‘Clock’
prog.cpp:7: error: ‘Clock’ was not declared in this scope
prog.cpp:10: error: ‘sf’ has not been declared