Compilare: user.c: In function ‘main’: user.c:71:5: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration] gutui=(gutui1 *)malloc(N*sizeof(gutui1)); ^ user.c:71:21: warning: incompatible implicit declaration of built-in function ‘malloc’ [enabled by default] gutui=(gutui1 *)malloc(N*sizeof(gutui1)); ^ user.c:67:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile,"%i",&N); ^ user.c:68:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile,"%i",&H); ^ user.c:69:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile,"%i",&U); ^ user.c:77:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile,"%i",&gutui[i].h); ^ user.c:78:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile,"%i",&gutui[i].g); ^ user.c:104:22: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] gutui[x].g=0; ^