Compilare: user.c: In function ‘QuickSort’: user.c:39:1: warning: implicit declaration of function ‘swap’ [-Wimplicit-function-declaration] swap(v,left,(left+right)/2); ^ user.c: At top level: user.c:52:6: warning: conflicting types for ‘swap’ [enabled by default] void swap(int v[],int i,int j){ ^ user.c:39:1: note: previous implicit declaration of ‘swap’ was here swap(v,left,(left+right)/2); ^ user.c: In function ‘main’: user.c:82:5: warning: passing argument 2 of ‘HugeAdd’ from incompatible pointer type [enabled by default] HugeAdd(result, operand); ^ user.c:12:6: note: expected ‘long long int *’ but argument is of type ‘int *’ void HugeAdd(int A[], long long B[]){ ^ user.c:83:5: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(operand, 0, 20 * sizeof(int)); ^ user.c:83:5: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default] user.c:90:27: warning: integer overflow in expression [-Woverflow] printf("%lld", 2000000000 * 2); ^ user.c:90:1: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld", 2000000000 * 2); ^ user.c:69:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &N); ^ user.c:72:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &A[i]); ^ user.c:75:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &B[i]); ^