str-rev

str.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char *op;

void revStr(char *ip){
	int ln = strlen(ip);
	op = malloc(sizeof(char)*(ln+1));
	int i,j,u,l;
	int st = 0;
	for(i=0;i<ln;i++){
		if(i==0 || ip[i-1]==' '){
			l = i;
			st = 0;
		}
		if(ip[i]==' '){
			u = i-1;
			st = 1;
			op[i]=' ';
		}else if(i==ln-1){
			u = i;
			st = 1;
			op[ln] = '\0';
		}
		if(st){
			for(j=l;j<=u;j++){
				op[j] = ip[u-j+l];
			}
		}
	}
	for(i=0;i<ln;i++){
		if(i==0 && (op[i]>='a' || op[i]<='z')){
			op[i] -= 32;
		}else if(op[i-1]==' ' && (op[i]>='a' || op[i]<='z')){
			op[i] -= 32;
		}
	}
}

int main(int argc,char *argv[]){
	char st[100];
	scanf("%99[^\n]s",st);
	revStr(st);
	printf("%s\n", op);
	free(op);
	return 0;
}