Now reads a file and obtains its numbers.
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60
src/Main.c
60
src/Main.c
@ -5,20 +5,38 @@
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#include <getopt.h>
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#include <unistd.h>
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// Version string
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const char *version = "v0.5";
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bool helpFlag = false;
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bool versionFlag = false;
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// Whether or not the calculations should be verbose
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bool verboseFlag = false;
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char *infile = NULL;
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// Function that prints help info
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inline void printHelp();
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int main(int argc, char **argv) {
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// There should always be at least be 2 arguments and no more than 4
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if(argc <= 1) {
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fprintf(stderr, "No arguments were provided. Use `-h' for help.\n");
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return 1;
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}
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// Variable where the argument is stored
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int arg;
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// If help info should be printed
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bool helpFlag = false;
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// If version info should be printed
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bool versionFlag = false;
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// The file to read the numbers from
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char *infile = NULL;
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while((arg = getopt(argc, argv, "hvVf:")) != -1) {
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switch(arg) {
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case 'h':
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// Only 2 arguments can be used
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if(argc != 2) {
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fprintf(stderr, "Invalid use of arguments. Use `-h' for help.\n");
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return 1;
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}
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helpFlag = true;
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break;
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@ -27,10 +45,20 @@ int main(int argc, char **argv) {
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break;
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case 'V':
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// Only 2 arguments can be used
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if(argc != 2) {
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fprintf(stderr, "Invalid use of arguments. Use `-h' for help.\n");
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return 1;
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}
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versionFlag = true;
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break;
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case 'f':
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// There needs to be between 3 and 4 arguments
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if(argc > 4 || argc < 3) {
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fprintf(stderr, "Invalid use of arguments. Use `-h' for help.\n");
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}
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// Set the input file
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infile = optarg;
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break;
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@ -45,6 +73,7 @@ int main(int argc, char **argv) {
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return 1;
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default:
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// If we get anything else that's weird just abort
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abort();
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}
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}
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@ -57,10 +86,35 @@ int main(int argc, char **argv) {
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return 0;
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}
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// Print copyright & license information
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printf("MMMCalc %s, Copyright (c) 2016 Nicolás A. Ortega.\n", version);
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printf("This program comes with ABSOLUTELY NO WARRANTY.\n");
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printf("This program is free software and you are welcome to redistribute\n");
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printf("under the terms and conditions of the GNU GPLv3 or higher.\n\n");
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// Open a file as read only
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FILE *numfile = fopen(infile, "r");
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// Temporary variable to see how many numbers are in this file
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double num;
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// The size of the coming nums array
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int size = 0;
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// Get the size for the array
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while(fscanf(numfile, "%lf", &num) == 1) size++;
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rewind(numfile);
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printf("There are %d numbers in the file.\n", size);
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// Create the array with that size
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double nums[size];
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for(int i = 0; i < size; i++) {
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// Store result of fscanf in err
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int err = fscanf(numfile, "%lf", &nums[i]);
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// If fscanf returned error exit out of here
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if(err != 1) {
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fprintf(stderr, "Error reading entire file.\n");
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return 1;
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}
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// If not let's continue printing
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printf("%f\n", nums[i]);
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}
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return 0;
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}
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