Compilare: main.c: In function 'main': main.c:74:9: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration] gets(s); ^~~~ main.c:75:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration] n=strlen(s); ^~~~~~ main.c:75:11: warning: incompatible implicit declaration of built-in function 'strlen' main.c:75:11: note: include '<string.h>' or provide a declaration of 'strlen' main.c:30:11: warning: variable 't' set but not used [-Wunused-but-set-variable] int l,t; ^ main.c:30:9: warning: unused variable 'l' [-Wunused-variable] int l,t; ^ main.c:29:36: warning: variable 'p' set but not used [-Wunused-but-set-variable] int k,x,a,b,c,d,f,nr,n,y,j,i,r,p,rez1,rez2,gr1,gr2,rez,o,s2,s1,nr2; ^ main.c:29:30: warning: unused variable 'j' [-Wunused-variable] int k,x,a,b,c,d,f,nr,n,y,j,i,r,p,rez1,rez2,gr1,gr2,rez,o,s2,s1,nr2; ^ main.c:29:9: warning: variable 'k' set but not used [-Wunused-but-set-variable] int k,x,a,b,c,d,f,nr,n,y,j,i,r,p,rez1,rez2,gr1,gr2,rez,o,s2,s1,nr2; ^ main.c:27:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("ec.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:28:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("ec.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:47:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&y,&x); ^~~~~~~~~~~~~~~~~~~~~~ main.c:52:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[z]); ^~~~~~~~~~~~~~~~~ main.c:53:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^~~~~~~~~~~ ./ccDC9cJC.o: In function `main': main.c:(.text.startup+0xeb): warning: the `gets' function is dangerous and should not be used.