Eroare de compilare: user.c: In function ‘cifra’: user.c:10:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==2) ^ user.c:21:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==3) ^ user.c:32:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==4) ^ user.c:37:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==7) ^ user.c:48:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==8) ^ user.c:59:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==9) ^ user.c: In function ‘scadere_1’: user.c:69:5: warning: implicit declaration of function ‘strrev’ [-Wimplicit-function-declaration] strrev(a); ^ user.c:80:12: warning: comparison between pointer and integer [enabled by default] if(a[0]==NULL) ^ user.c:68:10: warning: unused variable ‘c’ [-Wunused-variable] char c[1001]; ^ user.c:67:9: warning: unused variable ‘n’ [-Wunused-variable] int n = strlen(a), i=0, x=0; ^ user.c: In function ‘main’: user.c:91:5: warning: format ‘%c’ expects a matching ‘char *’ argument [-Wformat=] scanf("%d%c",&t); ^ user.c: In function ‘cifra’: user.c:64:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:88:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifra.in","r",stdin); ^ user.c:89:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifra.out","w",stdout); ^ user.c:91:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%c",&t); ^