c - Program to capitalise starting letter of each word

Question

My code is :

#include <stdio.h>
int main(){
    FILE *fp;
    FILE *fp1;
    fp=fopen ("input.txt","r");
    fp1=fopen ("output.txt","w+");
    char a;
    while ((a=fgetc(fp))!=EOF){
        fputc(a,fp1);
    }
    char b=fgetc(fp1);
    int e='a';
    int f='z';
    if (b>=e && b<=f){
        b-=32;
        fputc(b,fp1);
    }
    char c;
    while ((c=fgetc(fp1))!=EOF){
        if (c==' '){
            c=fgetc(fp1);
            if (c>=e && c<=f){
                c-=32;
                fputc (c,fp1);
            }
        }
    }
    return 0;
}

Sample Input:

C was invented to write an operating system called UNIX. C is a successor of B language which was introduced around 1970 The language was formalized in 1988 by the American National Standard Institue (ANSI). By 1973 UNIX OS almost totally written in C. Today C is the most widely used System Programming Language. Most of the state of the art software have been implemented using C. Easy to learn Structured language It produces efficient programs. It can handle low-level activities. It can be compiled on a variety of computers.

Sample output:

C Was Invented To Write An Operating System Called UNIX. C Is A Successor Of B Language Which Was Introduced Around 1970 The Language Was Formalized In 1988 By The American National Standard Institue (ANSI). By 1973 UNIX OS Almost Totally Written In C. Today C Is The Most Widely Used System Programming Language. Most Of The State Of The Art Software Have Been Implemented Using C. Easy To Learn Structured Language It Produces Efficient Programs. It Can Handle Low-level Activities. It Can Be Compiled On A Variety Of Computers.

However on compiling, I am getting same output as input. Can someone help?

question from:https://stackoverflow.com/questions/66049325/program-to-capitalise-starting-letter-of-each-word

Answer 1

You're over complicating things. This would do:

FILE *fp=fopen ("input.txt","r");
FILE *fp1=fopen ("output.txt","w+");    

int capitalize = 1;
int c; // int, not char

while((c = fgetc(fp)) != EOF) {
    char a = c;

    if(capitalize) {
        a = toupper(c);
        capitalize = 0;
    }

    if(isspace(a)
        capitalize = 1;

    fputc(a, fp1);
}