stdout:

stderr:
/home/wangfiox/Documents/database/performance_c/sy/conv2.sy:27:9: warning: add explicit braces to avoid dangling else [-Wdangling-else]
        else return y;
        ^
/home/wangfiox/Documents/database/performance_c/sy/conv2.sy:97:6: warning: incompatible redeclaration of library function 'memmove' [-Wincompatible-library-redeclaration]
void memmove(int dst[], int src[], int n){
     ^
/home/wangfiox/Documents/database/performance_c/sy/conv2.sy:97:6: note: 'memmove' is a builtin with type 'void *(void *, const void *, unsigned long)'
2 warnings generated.

stdout:

stderr:
/home/wangfiox/Documents/database/performance_c/sy/conv2.sy:27:9: warning: add explicit braces to avoid dangling else [-Wdangling-else]
        else return y;
        ^
/home/wangfiox/Documents/database/performance_c/sy/conv2.sy:97:6: warning: incompatible redeclaration of library function 'memmove' [-Wincompatible-library-redeclaration]
void memmove(int dst[], int src[], int n){
     ^
/home/wangfiox/Documents/database/performance_c/sy/conv2.sy:97:6: note: 'memmove' is a builtin with type 'void *(void *, const void *, unsigned long)'
2 warnings generated.