Compilare: main.c: In function 'main': main.c:7:13: warning: implicit declaration of function 'fopen64'; did you mean 'fopen'? [-Wimplicit-function-declaration] 7 | input = fopen64("adunare.in", "r"); | ^~~~~~~ | fopen main.c:7:11: warning: assignment to 'FILE *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 7 | input = fopen64("adunare.in", "r"); | ^ main.c:10:12: warning: assignment to 'FILE *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 10 | output = fopen64("adunare.out", "w"); | ^