Compilare: user.c: In function ‘main’: user.c:12:2: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration] fseek(f,0,0);int *l=malloc(3900000); ^ user.c:12:22: warning: incompatible implicit declaration of built-in function ‘malloc’ [enabled by default] fseek(f,0,0);int *l=malloc(3900000); ^ user.c:13:15: warning: unused variable ‘b’ [-Wunused-variable] char c;int a,b,cont=0; ^ user.c:13:13: warning: unused variable ‘a’ [-Wunused-variable] char c;int a,b,cont=0; ^ user.c:14:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:19:8: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:25:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:29:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:35:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:43:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:54:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:63:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:78:8: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:84:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:88:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:94:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=cont;cont++; ^ user.c:103:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result]