tramvai.c: In function 'main': tramvai.c:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:18: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:21: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:23: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result tramvai.c:20: warning: 'suma' may be used uninitialized in this function