Compilare: user.c: In function ‘main’: user.c:22:1: warning: implicit declaration of function ‘srand’ [-Wimplicit-function-declaration] srand(time(0)); ^ user.c:22:1: warning: implicit declaration of function ‘time’ [-Wimplicit-function-declaration] user.c:23:1: warning: implicit declaration of function ‘rand’ [-Wimplicit-function-declaration] if(rand()%2){ ^ user.c:18:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lf", &wf); ^ user.c:19:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lf", &hf); ^ user.c:20:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lf", &wp); ^ user.c:21:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lf", &hp); ^