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Reading data from file
Learning to Progam example from a Well House Consultants training course
More on Learning to Progam [link]
Source code: eleven.c Module: Q100
#include <stdio.h>
int main() { /* Reading from a data file instead of from the keyboard . We don't know how many rows of data, so play safe! Allow for the data for a whole year! */ int adults[366]; int kiddos[366]; int bigguns, littluns, current; int linecount = 0, footfall = 0; char lyne[65]; FILE * filehandle; /* Put values into those elements - reading from file */ /* Open the file, read it line by line */ filehandle = fopen("stuff.txt","r"); while (fgets(lyne,64,filehandle)) { /* get two numbers off EACH line */ sscanf(lyne,"%d %d",&bigguns,&littluns); printf("There were %d on board in total\n",bigguns+littluns); /* Save the numbers in an array */ /* Later enhancement - check you don't go off the end! */ adults[linecount] = bigguns; kiddos[linecount] = littluns; linecount = linecount + 1; } fclose(filehandle); /* Just to stop someone rapping my knuckles */ current = 0; while (current < linecount) { footfall = footfall + adults[current] + kiddos[current]; current = current + 1; } printf("Footfall logged - %d persons\n",footfall); } Learn about this subject
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This example comes from our "Learning to Progam" training module. You'll find a description of the topic and some
other closely related examples on the "Learning to Progam" module index page.
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