Compilare: user.c: In function ‘main’: user.c:44:5: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(frecv1, 0, 26 * sizeof(int)); ^ user.c:44:5: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default] user.c:50:5: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] len1 = strlen(word1); ^ user.c:50:12: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] len1 = strlen(word1); ^ user.c:41:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &T); ^ user.c:47:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%s", word1); ^ user.c:48:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%s", word2); ^